diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/aliases b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/aliases
new file mode 100644
index 00000000000..fb58dd5786f
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/aliases
@@ -0,0 +1,3 @@
+cloud/aws
+
+# ec2_transit_gateway_vpc_attachment_info
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/defaults/main.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/defaults/main.yml
new file mode 100644
index 00000000000..c9727746555
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/defaults/main.yml
@@ -0,0 +1,26 @@
+_resource_prefix: 'AnsibleTest'
+#_resource_prefix: 'AnsibleTest-{{ tiny_prefix }}-TGW-Attach'
+cidr_prefix: '10.{{ 255 | random(seed=_resource_prefix) }}'
+tgw_name: '{{ _resource_prefix }}'
+tgw_name_2: '{{ _resource_prefix }}-2'
+vpc_name_a: '{{ _resource_prefix }}-1'
+vpc_name_b: '{{ _resource_prefix }}-2'
+vpc_cidr_a: '{{ cidr_prefix }}.1.0/24'
+vpc_cidr_b: '{{ cidr_prefix }}.2.0/24'
+
+subnet_cidr_a_1: '{{ cidr_prefix }}.1.0/26'
+subnet_cidr_a_2: '{{ cidr_prefix }}.1.64/26'
+subnet_cidr_a_3: '{{ cidr_prefix }}.1.128/26'
+subnet_cidr_a_1a: '{{ cidr_prefix }}.1.192/26'
+subnet_cidr_b_1: '{{ cidr_prefix }}.2.0/26'
+subnet_cidr_b_2: '{{ cidr_prefix }}.2.64/26'
+
+subnet_name_a_1: '{{ _resource_prefix }}-a-1'
+subnet_name_a_1a: '{{ _resource_prefix }}-a-1a'
+subnet_name_a_2: '{{ _resource_prefix }}-a-2'
+subnet_name_a_3: '{{ _resource_prefix }}-a-3'
+subnet_name_b_1: '{{ _resource_prefix }}-b-1'
+subnet_name_b_2: '{{ _resource_prefix }}-b-2'
+
+attachment_name: '{{ _resource_prefix }}'
+attachment_name_complex: '{{ _resource_prefix }}-complex'
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/meta/main.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/meta/main.yml
new file mode 100644
index 00000000000..aef5ca0ee57
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/meta/main.yml
@@ -0,0 +1,2 @@
+dependencies:
+  - role: setup_ec2_facts
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/cleanup.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/cleanup.yml
new file mode 100644
index 00000000000..e59723bdc30
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/cleanup.yml
@@ -0,0 +1,64 @@
+---
+- name: 'Describe all attachments on our VPC'
+  ec2_transit_gateway_vpc_attachment_info:
+    filters:
+      transit-gateway-id: '{{ tgw_id }}'
+  register: info
+  ignore_errors: True
+
+- name: 'Start deletion of all attachments'
+  ec2_transit_gateway_vpc_attachment:
+    state: absent
+    id: '{{ item.transit_gateway_attachment_id }}'
+    wait: False
+  loop: '{{ info.attachments }}'
+  ignore_errors: True
+
+- name: 'Wait for deletion of all attachments'
+  ec2_transit_gateway_vpc_attachment:
+    state: absent
+    id: '{{ item.transit_gateway_attachment_id }}'
+    wait: True
+  loop: '{{ info.attachments }}'
+  ignore_errors: True
+
+- name: 'Delete subnets'
+  ec2_vpc_subnet:
+    state: absent
+    cidr: '{{ item.cidr }}'
+    vpc_id: '{{ item.vpc_id }}'
+  loop:
+  - cidr: '{{ subnet_cidr_a_1 }}'
+    vpc_id: '{{ vpc_id_a }}'
+  - cidr: '{{ subnet_cidr_a_2 }}'
+    vpc_id: '{{ vpc_id_a }}'
+  - cidr: '{{ subnet_cidr_a_3 }}'
+    vpc_id: '{{ vpc_id_a }}'
+  - cidr: '{{ subnet_cidr_b_1 }}'
+    vpc_id: '{{ vpc_id_b }}'
+  - cidr: '{{ subnet_cidr_b_2 }}'
+    vpc_id: '{{ vpc_id_b }}'
+  - cidr: '{{ subnet_cidr_a_1a }}'
+    vpc_id: '{{ vpc_id_a }}'
+  ignore_errors: True
+
+- name: 'Create VPCs to attach to TGW'
+  ec2_vpc_net:
+    state: absent
+    cidr_block: '{{ item.cidr }}'
+    name: '{{ item.name }}'
+  loop:
+  - cidr: '{{ vpc_cidr_a }}'
+    name: '{{ vpc_name_a }}'
+  - cidr: '{{ vpc_cidr_b }}'
+    name: '{{ vpc_name_b }}'
+  ignore_errors: True
+
+- name: 'Create Transit Gateways'
+  ec2_transit_gateway:
+    state: absent
+    transit_gateway_id: '{{ item.tgw_id }}'
+  loop:
+  - tgw_id: '{{ tgw_id }}'
+  - tgw_id: '{{ tgw_id_2 }}'
+  ignore_errors: True
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/complex.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/complex.yml
new file mode 100644
index 00000000000..eda3ab2ace4
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/complex.yml
@@ -0,0 +1,443 @@
+---
+# Tests the setting of most parameters at the same time
+#
+# Note: Does not delete the attachment, so that there's a second VPC attached to
+# the TGW when we run our _info tests in simple.yml
+#
+# =============================================================================
+# Creation
+
+- block:
+  - name: '(CHECK_MODE) Create an attachment - complex parameters'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      tags:
+        tagA: 'example Value'
+        Tag_B: 'second value'
+      appliance_mode_support: True
+      ipv6_support: True
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"options" in attachment'
+      - '"subnet_ids" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == "enable"
+      - attachment.options.ipv6_support == "enable"
+      - attachment.subnet_ids | length == 2
+      - subnet_id_b_1 in attachment.subnet_ids
+      - subnet_id_b_2 in attachment.subnet_ids
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: 'Create an attachment - complex parameters'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      tags:
+        tagA: 'example Value'
+        Tag_B: 'second value'
+      appliance_mode_support: True
+      ipv6_support: True
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_b_1 in attachment.subnet_ids
+      - subnet_id_b_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.transit_gateway_attachment_id.startswith('tgw-attach-')
+      - attachment.state == 'available'
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: Save Attachment ID
+    set_fact:
+      complex_attachment_id: '{{ complex_attach.attachments[0].transit_gateway_attachment_id }}'
+
+  - name: '(CHECK_MODE) Create an attachment - complex parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      tags:
+        tagA: 'example Value'
+        Tag_B: 'second value'
+      appliance_mode_support: True
+      ipv6_support: True
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is not changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_b_1 in attachment.subnet_ids
+      - subnet_id_b_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: 'Create an attachment - complex parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      tags:
+        tagA: 'example Value'
+        Tag_B: 'second value'
+      appliance_mode_support: True
+      ipv6_support: True
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is not changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_b_1 in attachment.subnet_ids
+      - subnet_id_b_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+# =============================================================================
+# Update
+
+  - name: '(CHECK_MODE) Update an attachment - complex parameters'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      purge_subnets: True
+      tags:
+        tagC: '3'
+        Tag_D: 'Hello again dear world'
+      purge_tags: False
+      dns_support: False
+      ipv6_support: False
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_b_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - '"tagC" in attachment.tags'
+      - '"Tag_D" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.tags.tagC == "3"
+      - attachment.tags.Tag_D == "Hello again dear world"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: 'Update an attachment - complex parameters'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      purge_subnets: True
+      tags:
+        tagC: '3'
+        Tag_D: 'Hello again dear world'
+      purge_tags: False
+      dns_support: False
+      ipv6_support: False
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_b_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - '"tagC" in attachment.tags'
+      - '"Tag_D" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.tags.tagC == "3"
+      - attachment.tags.Tag_D == "Hello again dear world"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Update an attachment - complex parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      purge_subnets: True
+      tags:
+        tagC: '3'
+        Tag_D: 'Hello again dear world'
+      purge_tags: False
+      dns_support: False
+      ipv6_support: False
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is not changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_b_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - '"tagC" in attachment.tags'
+      - '"Tag_D" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.tags.tagC == "3"
+      - attachment.tags.Tag_D == "Hello again dear world"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
+
+  - name: 'Update an attachment - complex parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name_complex }}'
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_b_1 }}'
+      purge_subnets: True
+      tags:
+        tagC: '3'
+        Tag_D: 'Hello again dear world'
+      purge_tags: False
+      dns_support: False
+      ipv6_support: False
+    register: complex_attach
+
+  - assert:
+      that:
+      - complex_attach is not changed
+      - '"attachments" in complex_attach'
+      - complex_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_b_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_b
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.transit_gateway_attachment_id == complex_attachment_id
+      - attachment.state == 'available'
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"tagA" in attachment.tags'
+      - '"Tag_B" in attachment.tags'
+      - '"tagC" in attachment.tags'
+      - '"Tag_D" in attachment.tags'
+      - attachment.tags.Name == attachment_name_complex
+      - attachment.tags.tagA == "example Value"
+      - attachment.tags.Tag_B == "second value"
+      - attachment.tags.tagC == "3"
+      - attachment.tags.Tag_D == "Hello again dear world"
+      - attachment.vpc_owner_id == vpc_owner_b
+    vars:
+      attachment: '{{ complex_attach.attachments[0] }}'
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/main.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/main.yml
new file mode 100644
index 00000000000..8694b829e7b
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/main.yml
@@ -0,0 +1,24 @@
+---
+- name: 'ec2_transit_gateway_vpc_attachment integration tests'
+  collections:
+    - amazon.aws
+  module_defaults:
+    group/aws:
+      aws_access_key: '{{ aws_access_key }}'
+      aws_secret_key: '{{ aws_secret_key }}'
+      security_token: '{{ security_token | default(omit) }}'
+      region: '{{ aws_region }}'
+
+  block:
+    # Prepares various resources
+    - include_tasks: 'setup.yml'
+
+    # Tests create / update on parameters simulatniously
+    - include_tasks: 'complex.yml'
+
+    # Tests create / update / delete on individual parameters
+    - include_tasks: 'simple.yml'
+
+  always:
+    # Cleanup after ourselves
+    - include_tasks: 'cleanup.yml'
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/setup.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/setup.yml
new file mode 100644
index 00000000000..86d5aa51b5f
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/setup.yml
@@ -0,0 +1,101 @@
+---
+- name: 'Pick 2 AZs available for use'
+  set_fact:
+    subnet_az_a_1: '{{ ec2_availability_zone_names[0] }}'
+    subnet_az_a_1a: '{{ ec2_availability_zone_names[0] }}'
+    subnet_az_a_2: '{{ ec2_availability_zone_names[1] }}'
+    subnet_az_a_3: '{{ ec2_availability_zone_names[2] }}'
+    subnet_az_b_1: '{{ ec2_availability_zone_names[0] }}'
+    subnet_az_b_2: '{{ ec2_availability_zone_names[1] }}'
+
+- name: 'Create Transit Gateways'
+  ec2_transit_gateway:
+    description: '{{ item.description }}'
+    tags:
+      Name: '{{ item.name }}'
+  loop:
+  - description: 'Transit Gateway for testing ec2_transit_gateway_attachment'
+    name: '{{ tgw_name }}'
+  - description: 'Second Transit Gateway for testing ec2_transit_gateway_attachment'
+    name: '{{ tgw_name_2 }}'
+  register: create_tgws
+
+- name: 'Create VPCs to attach to TGW'
+  ec2_vpc_net:
+    cidr_block: '{{ item.cidr }}'
+    name: '{{ item.name }}'
+    ipv6_cidr: True
+  loop:
+  - cidr: '{{ vpc_cidr_a }}'
+    name: '{{ vpc_name_a }}'
+  - cidr: '{{ vpc_cidr_b }}'
+    name: '{{ vpc_name_b }}'
+  register: create_vpcs
+
+- set_fact:
+    tgw_id: '{{ create_tgws.results[0].transit_gateway.transit_gateway_id }}'
+    tgw_id_2: '{{ create_tgws.results[1].transit_gateway.transit_gateway_id }}'
+    vpc_id_a: '{{ vpc_a.id }}'
+    vpc_id_b: '{{ vpc_b.id }}'
+    vpc_owner_a: '{{ vpc_a.owner_id }}'
+    vpc_owner_b: '{{ vpc_b.owner_id }}'
+    subnet_ipv6_a_1: '{{ vpc_ipv6_a | replace("0::/56","0::/64") }}'
+    subnet_ipv6_a_2: '{{ vpc_ipv6_a | replace("0::/56","1::/64") }}'
+    subnet_ipv6_a_3: '{{ vpc_ipv6_a | replace("0::/56","2::/64") }}'
+    subnet_ipv6_a_1a: '{{ vpc_ipv6_a | replace("0::/56","3::/64") }}'
+    subnet_ipv6_b_1: '{{ vpc_ipv6_b | replace("0::/56","0::/64") }}'
+    subnet_ipv6_b_2: '{{ vpc_ipv6_b | replace("0::/56","1::/64") }}'
+  vars:
+    vpc_a: '{{ create_vpcs.results[0].vpc }}'
+    vpc_b: '{{ create_vpcs.results[1].vpc }}'
+    vpc_ipv6_a: '{{ vpc_a.ipv6_cidr_block_association_set[0].ipv6_cidr_block }}'
+    vpc_ipv6_b: '{{ vpc_b.ipv6_cidr_block_association_set[0].ipv6_cidr_block }}'
+
+- name: 'Create subnets'
+  ec2_vpc_subnet:
+    az: '{{ item.az }}'
+    cidr: '{{ item.cidr }}'
+    ipv6_cidr: '{{ item.ipv6_cidr }}'
+    tags:
+      Name: '{{ item.name }}'
+    vpc_id: '{{ item.vpc_id }}'
+  loop:
+  - az: '{{ subnet_az_a_1 }}'
+    cidr: '{{ subnet_cidr_a_1 }}'
+    ipv6_cidr: '{{ subnet_ipv6_a_1 }}'
+    vpc_id: '{{ vpc_id_a }}'
+    name: '{{ subnet_name_a_1 }}'
+  - az: '{{ subnet_az_a_2 }}'
+    cidr: '{{ subnet_cidr_a_2 }}'
+    ipv6_cidr: '{{ subnet_ipv6_a_2 }}'
+    vpc_id: '{{ vpc_id_a }}'
+    name: '{{ subnet_name_a_2 }}'
+  - az: '{{ subnet_az_a_3 }}'
+    cidr: '{{ subnet_cidr_a_3 }}'
+    ipv6_cidr: '{{ subnet_ipv6_a_3 }}'
+    vpc_id: '{{ vpc_id_a }}'
+    name: '{{ subnet_name_a_3 }}'
+  - az: '{{ subnet_az_b_1 }}'
+    cidr: '{{ subnet_cidr_b_1 }}'
+    ipv6_cidr: '{{ subnet_ipv6_b_1 }}'
+    vpc_id: '{{ vpc_id_b }}'
+    name: '{{ subnet_name_b_1 }}'
+  - az: '{{ subnet_az_b_2 }}'
+    cidr: '{{ subnet_cidr_b_2 }}'
+    ipv6_cidr: '{{ subnet_ipv6_b_2 }}'
+    vpc_id: '{{ vpc_id_b }}'
+    name: '{{ subnet_name_b_2 }}'
+  - az: '{{ subnet_az_a_1a }}'
+    cidr: '{{ subnet_cidr_a_1a }}'
+    ipv6_cidr: '{{ subnet_ipv6_a_1a }}'
+    vpc_id: '{{ vpc_id_a }}'
+    name: '{{ subnet_name_a_1a }}'
+  register: create_subnets
+
+- set_fact:
+    subnet_id_a_1: '{{ create_subnets.results[0].subnet.id }}'
+    subnet_id_a_2: '{{ create_subnets.results[1].subnet.id }}'
+    subnet_id_a_3: '{{ create_subnets.results[2].subnet.id }}'
+    subnet_id_b_1: '{{ create_subnets.results[3].subnet.id }}'
+    subnet_id_b_2: '{{ create_subnets.results[4].subnet.id }}'
+    subnet_id_a_1a: '{{ create_subnets.results[5].subnet.id }}'
diff --git a/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/simple.yml b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/simple.yml
new file mode 100644
index 00000000000..0085813a322
--- /dev/null
+++ b/tests/integration/targets/ec2_transit_gateway_vpc_attachment/tasks/simple.yml
@@ -0,0 +1,3611 @@
+---
+# =============================================================================
+# Creation
+- block:
+  - name: '(CHECK_MODE) Create an attachment - minimal parameters'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Create an attachment - minimal parameters'
+    ec2_transit_gateway_vpc_attachment:
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.transit_gateway_attachment_id.startswith('tgw-attach-')
+      - attachment.state == 'available'
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: Save Attachment ID
+    set_fact:
+      simple_attachment_id: '{{ simple_attach.attachments[0].transit_gateway_attachment_id }}'
+
+  - name: '(CHECK_MODE) Create an attachment - minimal parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Create an attachment - minimal parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      transit_gateway: '{{ tgw_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) By Id - minimal parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'By Id - minimal parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =============================================================================
+# Set a name
+
+  - name: '(CHECK_MODE) Set name'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set name'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Set name -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set name -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) By Name - minimal parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'By Name - minimal parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =============================================================================
+# Describe
+
+  - name: 'Describe all attachments'
+    ec2_transit_gateway_vpc_attachment_info:
+    register: info
+
+  - assert:
+      that:
+      - info is not changed
+      - '"attachments" in info'
+      - info.attachments | length >= 2
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length >= 1
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - '"Name" in attachment.tags'
+    vars:
+      attachment: '{{ info.attachments[0] }}'
+
+  - name: 'Describe attachments on a specific VPC'
+    ec2_transit_gateway_vpc_attachment_info:
+      filters:
+        transit-gateway-id: '{{ tgw_id }}'
+    register: info
+
+  - assert:
+      that:
+      - info is not changed
+      - '"attachments" in info'
+      - info.attachments | length == 2
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length >= 1
+      - attachment.transit_gateway_id == tgw_id
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - '"Name" in attachment.tags'
+    vars:
+      attachment: '{{ info.attachments[0] }}'
+
+  - name: 'Describe attachment with a specific name'
+    ec2_transit_gateway_vpc_attachment_info:
+      name: '{{ attachment_name }}'
+    register: info
+
+  - assert:
+      that:
+      - info is not changed
+      - '"attachments" in info'
+      - info.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ info.attachments[0] }}'
+
+  - name: 'Describe attachment by ID'
+    ec2_transit_gateway_vpc_attachment_info:
+      id: '{{ simple_attachment_id }}'
+    register: info
+
+  - assert:
+      that:
+      - info is not changed
+      - '"attachments" in info'
+      - info.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ info.attachments[0] }}'
+
+# =============================================================================
+# Tag attachment
+
+  - name: '(CHECK_MODE) Set tags'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+        snake_case: snake_case_value
+        "Tag with Space": value with space
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set tags'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+        snake_case: snake_case_value
+        "Tag with Space": value with space
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Set tags -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+        snake_case: snake_case_value
+        "Tag with Space": value with space
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set tags -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+        snake_case: snake_case_value
+        "Tag with Space": value with space
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Describe attachment with tags set'
+    ec2_transit_gateway_vpc_attachment_info:
+      id: '{{ simple_attachment_id }}'
+    register: info
+
+  - assert:
+      that:
+      - info is not changed
+      - '"attachments" in info'
+      - info.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ info.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) No change to tags with name set -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'No change to tags with name set -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value'
+      - attachment.tags['Tag with Space'] == 'value with space'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Update tags'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        snake_case: snake_case_value 2
+        "Tag with Space": value with space 2
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value 2'
+      - attachment.tags['Tag with Space'] == 'value with space 2'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update tags'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        snake_case: snake_case_value 2
+        "Tag with Space": value with space 2
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value 2'
+      - attachment.tags['Tag with Space'] == 'value with space 2'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Update tags -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        snake_case: snake_case_value 2
+        "Tag with Space": value with space 2
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value 2'
+      - attachment.tags['Tag with Space'] == 'value with space 2'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update tags -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        snake_case: snake_case_value 2
+        "Tag with Space": value with space 2
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 5
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"snake_case" in attachment.tags'
+      - '"Tag with Space" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.snake_case == 'snake_case_value 2'
+      - attachment.tags['Tag with Space'] == 'value with space 2'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Remove tags'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove tags'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Remove tags -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove tags -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags:
+        CamelCase: CamelCaseValue
+        pascalCase: pascalCaseValue
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 3
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Add tags with no purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        AnotherTag: Another Value
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 4
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"AnotherTag" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.AnotherTag == 'Another Value'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add tags with no purge'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        AnotherTag: Another Value
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 4
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"AnotherTag" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.AnotherTag == 'Another Value'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Add tags with no purge -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        AnotherTag: Another Value
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 4
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"AnotherTag" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.AnotherTag == 'Another Value'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add tags with no purge -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      purge_tags: False
+      tags:
+        AnotherTag: Another Value
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 4
+      - '"Name" in attachment.tags'
+      - '"CamelCase" in attachment.tags'
+      - '"pascalCase" in attachment.tags'
+      - '"AnotherTag" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.tags.CamelCase == 'CamelCaseValue'
+      - attachment.tags.pascalCase == 'pascalCaseValue'
+      - attachment.tags.AnotherTag == 'Another Value'
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Remove all tags with name set'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove all tags with name set'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Remove all tags with name set -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove all tags with name set -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      name: '{{ attachment_name }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 1
+      - '"Name" in attachment.tags'
+      - attachment.tags.Name == attachment_name
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Remove all tags including name'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove all tags including name'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Remove all tags including name -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove all tags including name -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      tags: {}
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =============================================================================
+# Options
+
+  - name: '(CHECK_MODE) Set IPv6 support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set IPv6 support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Set IPv6 support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set IPv6 support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Set DNS support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set DNS support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Set DNS support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set DNS support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Set Appliance Mode support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set Appliance Mode support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Set Appliance Mode support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Set Appliance Mode support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'enable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Update IPv6 support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update IPv6 support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Update IPv6 support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update IPv6 support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      ipv6_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'disable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Update DNS support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update DNS support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Update DNS support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update DNS support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      dns_support: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'enable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Update Appliance Mode support'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update Appliance Mode support'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Update Appliance Mode support -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Update Appliance Mode support -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      appliance_mode_support: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 1
+      - subnet_id_a_1 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =============================================================================
+# Subnet Management
+
+  - name: '(CHECK_MODE) Try to add subnet from a different VPC - no purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_b_2 }}'
+      purge_subnets: False
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+  - name: 'Try to add subnet from a different VPC - no purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_b_2 }}'
+      purge_subnets: False
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+# =====
+
+  - name: '(CHECK_MODE) Try to add subnet from a different VPC - with purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      purge_subnets: True
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+  - name: 'Try to add subnet from a different VPC - with purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_b_2 }}'
+      purge_subnets: True
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+# =====
+
+  - name: '(CHECK_MODE) Try to add subnet in the same AZ - no purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_b_1a }}'
+      purge_subnets: False
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+  - name: 'Try to add subnet in the same AZ - no purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1a }}'
+      purge_subnets: False
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+# =====
+
+  - name: '(CHECK_MODE) Try to add subnet in the same AZ - with purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_1a }}'
+      purge_subnets: True
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+  - name: 'Try to add subnet in the same AZ - with purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_1a }}'
+      purge_subnets: True
+    register: simple_attach
+    ignore_errors: True
+
+  - assert:
+      that:
+      - simple_attach is failed
+
+# =====
+
+  - name: '(CHECK_MODE) Add subnet - without purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add subnet - without purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Add subnet - without purge -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add subnet - without purge -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Add subnet - with purge'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 3
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add subnet - with purge'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 3
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Add subnet - with purge -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 3
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Add subnet - with purge -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 3
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Remove subnet'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove subnet'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Remove subnet -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove subnet -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_2 }}'
+      - '{{ subnet_id_a_3 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_2 in attachment.subnet_ids
+      - subnet_id_a_3 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =====
+
+  - name: '(CHECK_MODE) Remove and add subnet'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove and add subnet'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: '(CHECK_MODE) Remove and add subnet -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+  - name: 'Remove and add subnet -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      id: '{{ simple_attachment_id }}'
+      subnets:
+      - '{{ subnet_id_a_1 }}'
+      - '{{ subnet_id_a_2 }}'
+      purge_subnets: True
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+      - '"attachments" in simple_attach'
+      - simple_attach.attachments | length == 1
+      - '"subnet_ids" in attachment'
+      - '"transit_gateway_id" in attachment'
+      - '"vpc_id" in attachment'
+      - attachment.subnet_ids | length == 2
+      - subnet_id_a_1 in attachment.subnet_ids
+      - subnet_id_a_2 in attachment.subnet_ids
+      - attachment.transit_gateway_id == tgw_id
+      - attachment.vpc_id == vpc_id_a
+      - '"creation_time" in attachment'
+      - '"options" in attachment'
+      - '"state" in attachment'
+      - '"tags" in attachment'
+      - '"transit_gateway_attachment_id" in attachment'
+      - '"vpc_owner_id" in attachment'
+      - '"appliance_mode_support" in attachment.options'
+      - '"dns_support" in attachment.options'
+      - '"ipv6_support" in attachment.options'
+      - attachment.options.appliance_mode_support == 'disable'
+      - attachment.options.dns_support == 'enable'
+      - attachment.options.ipv6_support == 'disable'
+      - attachment.state == 'available'
+      - attachment.transit_gateway_attachment_id == simple_attachment_id
+      - attachment.tags | length == 0
+      - attachment.vpc_owner_id == vpc_owner_a
+    vars:
+      attachment: '{{ simple_attach.attachments[0] }}'
+
+# =============================================================================
+# Deletion
+
+  - name: '(CHECK_MODE) Delete an attachment - minimal parameters'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      state: absent
+      id: '{{ simple_attachment_id }}'
+      wait: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+
+  - name: 'Delete an attachment - minimal parameters'
+    ec2_transit_gateway_vpc_attachment:
+      state: absent
+      id: '{{ simple_attachment_id }}'
+      wait: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is changed
+
+  - name: '(CHECK_MODE) Delete an attachment - minimal parameters -- IDEMPOTENCY'
+    check_mode: True
+    ec2_transit_gateway_vpc_attachment:
+      state: absent
+      id: '{{ simple_attachment_id }}'
+      wait: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+
+  - name: 'Delete an attachment - minimal parameters -- IDEMPOTENCY'
+    ec2_transit_gateway_vpc_attachment:
+      state: absent
+      id: '{{ simple_attachment_id }}'
+      wait: False
+    register: simple_attach
+
+  - assert:
+      that:
+      - simple_attach is not changed
+
+  always:
+  - name: 'Delete attachment'
+    ec2_transit_gateway_vpc_attachment:
+      state: absent
+      id: '{{ simple_attachment_id }}'
+      wait: False
+    ignore_errors: True