route53: fix empty result set (ansible-collections#799)

route53: fix empty result set

SUMMARY
Closes: ansible-collections#798
Using state: get on none existing records results in an error.
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME

route53
ADDITIONAL INFORMATION

plugins/modules/route53.py

@@ -637,6 +637,11 @@ def main():
             ns = get_hosted_zone_nameservers(route53, zone_id)
 
         formatted_aws = format_record(aws_record, zone_in, zone_id)
+
+        if formatted_aws is None:
+            # record does not exist
+            module.exit_json(changed=False, set=[], nameservers=ns, resource_record_sets=[])
+
         rr_sets = [camel_dict_to_snake_dict(aws_record)]
         module.exit_json(changed=False, set=formatted_aws, nameservers=ns, resource_record_sets=rr_sets)
 

tests/integration/targets/route53/tasks/main.yml

@@ -417,6 +417,20 @@
         - get_result.set.ResourceRecords[0].Value == "192.0.2.1"
         - get_result.set.Type == "A"
 
+  - name: Get a record that does not exist
+    route53:
+      state: get
+      zone: "{{ zone_two }}"
+      record: "notfound.{{ zone_two }}"
+      type: A
+      private_zone: true
+    register: get_result
+  - assert:
+      that:
+        - get_result.nameservers|length > 0
+        - get_result.set|length == 0
+        - get_result.resource_record_sets|length == 0
+
   - name: Create same A record using zone non-qualified domain
     route53:
       state: present