Pub/Sub: update how to test with mock [(#2555)](GoogleCloudPlatform/p…

…ython-docs-samples#2555)

* Update test with mock
* Clean up resources after tests
* Use unique resource names avoid test failures
* Delete subscriptions in cleanup phase
* Ensure unique topic name
* Update assert to remove bytestring notation
* Rewrite PubSubToGCS test using dataflow testing module

samples/snippets/iam.py

@@ -34,9 +34,9 @@ def get_topic_policy(project, topic_name):
 
     policy = client.get_iam_policy(topic_path)
 
-    print('Policy for topic {}:'.format(topic_path))
+    print("Policy for topic {}:".format(topic_path))
     for binding in policy.bindings:
-        print('Role: {}, Members: {}'.format(binding.role, binding.members))
+        print("Role: {}, Members: {}".format(binding.role, binding.members))
     # [END pubsub_get_topic_policy]
 
 
@@ -48,9 +48,9 @@ def get_subscription_policy(project, subscription_name):
 
     policy = client.get_iam_policy(subscription_path)
 
-    print('Policy for subscription {}:'.format(subscription_path))
+    print("Policy for subscription {}:".format(subscription_path))
     for binding in policy.bindings:
-        print('Role: {}, Members: {}'.format(binding.role, binding.members))
+        print("Role: {}, Members: {}".format(binding.role, binding.members))
     # [END pubsub_get_subscription_policy]
 
 
@@ -63,20 +63,17 @@ def set_topic_policy(project, topic_name):
     policy = client.get_iam_policy(topic_path)
 
     # Add all users as viewers.
-    policy.bindings.add(
-        role='roles/pubsub.viewer',
-        members=['allUsers'])
+    policy.bindings.add(role="roles/pubsub.viewer", members=["allUsers"])
 
     # Add a group as a publisher.
     policy.bindings.add(
-        role='roles/pubsub.publisher',
-        members=['group:[email protected]'])
+        role="roles/pubsub.publisher", members=["group:[email protected]"]
+    )
 
     # Set the policy
     policy = client.set_iam_policy(topic_path, policy)
 
-    print('IAM policy for topic {} set: {}'.format(
-        topic_name, policy))
+    print("IAM policy for topic {} set: {}".format(topic_name, policy))
     # [END pubsub_set_topic_policy]
 
 
@@ -89,20 +86,21 @@ def set_subscription_policy(project, subscription_name):
     policy = client.get_iam_policy(subscription_path)
 
     # Add all users as viewers.
-    policy.bindings.add(
-        role='roles/pubsub.viewer',
-        members=['allUsers'])
+    policy.bindings.add(role="roles/pubsub.viewer", members=["allUsers"])
 
     # Add a group as an editor.
     policy.bindings.add(
-        role='roles/editor',
-        members=['group:[email protected]'])
+        role="roles/editor", members=["group:[email protected]"]
+    )
 
     # Set the policy
     policy = client.set_iam_policy(subscription_path, policy)
 
-    print('IAM policy for subscription {} set: {}'.format(
-        subscription_name, policy))
+    print(
+        "IAM policy for subscription {} set: {}".format(
+            subscription_name, policy
+        )
+    )
     # [END pubsub_set_subscription_policy]
 
 
@@ -112,16 +110,17 @@ def check_topic_permissions(project, topic_name):
     client = pubsub_v1.PublisherClient()
     topic_path = client.topic_path(project, topic_name)
 
-    permissions_to_check = [
-        'pubsub.topics.publish',
-        'pubsub.topics.update'
-    ]
+    permissions_to_check = ["pubsub.topics.publish", "pubsub.topics.update"]
 
     allowed_permissions = client.test_iam_permissions(
-        topic_path, permissions_to_check)
+        topic_path, permissions_to_check
+    )
 
-    print('Allowed permissions for topic {}: {}'.format(
-        topic_path, allowed_permissions))
+    print(
+        "Allowed permissions for topic {}: {}".format(
+            topic_path, allowed_permissions
+        )
+    )
     # [END pubsub_test_topic_permissions]
 
 
@@ -132,63 +131,73 @@ def check_subscription_permissions(project, subscription_name):
     subscription_path = client.subscription_path(project, subscription_name)
 
     permissions_to_check = [
-        'pubsub.subscriptions.consume',
-        'pubsub.subscriptions.update'
+        "pubsub.subscriptions.consume",
+        "pubsub.subscriptions.update",
     ]
 
     allowed_permissions = client.test_iam_permissions(
-        subscription_path, permissions_to_check)
+        subscription_path, permissions_to_check
+    )
 
-    print('Allowed permissions for subscription {}: {}'.format(
-        subscription_path, allowed_permissions))
+    print(
+        "Allowed permissions for subscription {}: {}".format(
+            subscription_path, allowed_permissions
+        )
+    )
     # [END pubsub_test_subscription_permissions]
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description=__doc__,
-        formatter_class=argparse.RawDescriptionHelpFormatter
+        formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    parser.add_argument('project', help='Your Google Cloud project ID')
+    parser.add_argument("project", help="Your Google Cloud project ID")
 
-    subparsers = parser.add_subparsers(dest='command')
+    subparsers = parser.add_subparsers(dest="command")
 
     get_topic_policy_parser = subparsers.add_parser(
-        'get-topic-policy', help=get_topic_policy.__doc__)
-    get_topic_policy_parser.add_argument('topic_name')
+        "get-topic-policy", help=get_topic_policy.__doc__
+    )
+    get_topic_policy_parser.add_argument("topic_name")
 
     get_subscription_policy_parser = subparsers.add_parser(
-        'get-subscription-policy', help=get_subscription_policy.__doc__)
-    get_subscription_policy_parser.add_argument('subscription_name')
+        "get-subscription-policy", help=get_subscription_policy.__doc__
+    )
+    get_subscription_policy_parser.add_argument("subscription_name")
 
     set_topic_policy_parser = subparsers.add_parser(
-        'set-topic-policy', help=set_topic_policy.__doc__)
-    set_topic_policy_parser.add_argument('topic_name')
+        "set-topic-policy", help=set_topic_policy.__doc__
+    )
+    set_topic_policy_parser.add_argument("topic_name")
 
     set_subscription_policy_parser = subparsers.add_parser(
-        'set-subscription-policy', help=set_subscription_policy.__doc__)
-    set_subscription_policy_parser.add_argument('subscription_name')
+        "set-subscription-policy", help=set_subscription_policy.__doc__
+    )
+    set_subscription_policy_parser.add_argument("subscription_name")
 
     check_topic_permissions_parser = subparsers.add_parser(
-        'check-topic-permissions', help=check_topic_permissions.__doc__)
-    check_topic_permissions_parser.add_argument('topic_name')
+        "check-topic-permissions", help=check_topic_permissions.__doc__
+    )
+    check_topic_permissions_parser.add_argument("topic_name")
 
     check_subscription_permissions_parser = subparsers.add_parser(
-        'check-subscription-permissions',
-        help=check_subscription_permissions.__doc__)
-    check_subscription_permissions_parser.add_argument('subscription_name')
+        "check-subscription-permissions",
+        help=check_subscription_permissions.__doc__,
+    )
+    check_subscription_permissions_parser.add_argument("subscription_name")
 
     args = parser.parse_args()
 
-    if args.command == 'get-topic-policy':
+    if args.command == "get-topic-policy":
         get_topic_policy(args.project, args.topic_name)
-    elif args.command == 'get-subscription-policy':
+    elif args.command == "get-subscription-policy":
         get_subscription_policy(args.project, args.subscription_name)
-    elif args.command == 'set-topic-policy':
+    elif args.command == "set-topic-policy":
         set_topic_policy(args.project, args.topic_name)
-    elif args.command == 'set-subscription-policy':
+    elif args.command == "set-subscription-policy":
         set_subscription_policy(args.project, args.subscription_name)
-    elif args.command == 'check-topic-permissions':
+    elif args.command == "check-topic-permissions":
         check_topic_permissions(args.project, args.topic_name)
-    elif args.command == 'check-subscription-permissions':
+    elif args.command == "check-subscription-permissions":
         check_subscription_permissions(args.project, args.subscription_name)

samples/snippets/iam_test.py

@@ -13,23 +13,25 @@
 # limitations under the License.
 
 import os
+import uuid
 
 from google.cloud import pubsub_v1
 import pytest
 
 import iam
 
-PROJECT = os.environ['GCLOUD_PROJECT']
-TOPIC = 'iam-test-topic'
-SUBSCRIPTION = 'iam-test-subscription'
+UUID = uuid.uuid4().hex
+PROJECT = os.environ["GCLOUD_PROJECT"]
+TOPIC = "iam-test-topic-" + UUID
+SUBSCRIPTION = "iam-test-subscription-" + UUID
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 def publisher_client():
     yield pubsub_v1.PublisherClient()
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 def topic(publisher_client):
     topic_path = publisher_client.topic_path(PROJECT, TOPIC)
 
@@ -42,16 +44,19 @@ def topic(publisher_client):
 
     yield topic_path
 
+    publisher_client.delete_topic(topic_path)
 
-@pytest.fixture(scope='module')
+
+@pytest.fixture(scope="module")
 def subscriber_client():
     yield pubsub_v1.SubscriberClient()
 
 
 @pytest.fixture
 def subscription(subscriber_client, topic):
     subscription_path = subscriber_client.subscription_path(
-        PROJECT, SUBSCRIPTION)
+        PROJECT, SUBSCRIPTION
+    )
 
     try:
         subscriber_client.delete_subscription(subscription_path)
@@ -62,6 +67,8 @@ def subscription(subscriber_client, topic):
 
     yield subscription_path
 
+    subscriber_client.delete_subscription(subscription_path)
+
 
 def test_get_topic_policy(topic, capsys):
     iam.get_topic_policy(PROJECT, TOPIC)
@@ -81,16 +88,16 @@ def test_set_topic_policy(publisher_client, topic):
     iam.set_topic_policy(PROJECT, TOPIC)
 
     policy = publisher_client.get_iam_policy(topic)
-    assert 'roles/pubsub.publisher' in str(policy)
-    assert 'allUsers' in str(policy)
+    assert "roles/pubsub.publisher" in str(policy)
+    assert "allUsers" in str(policy)
 
 
 def test_set_subscription_policy(subscriber_client, subscription):
     iam.set_subscription_policy(PROJECT, SUBSCRIPTION)
 
     policy = subscriber_client.get_iam_policy(subscription)
-    assert 'roles/pubsub.viewer' in str(policy)
-    assert 'allUsers' in str(policy)
+    assert "roles/pubsub.viewer" in str(policy)
+    assert "allUsers" in str(policy)
 
 
 def test_check_topic_permissions(topic, capsys):
@@ -99,7 +106,7 @@ def test_check_topic_permissions(topic, capsys):
     out, _ = capsys.readouterr()
 
     assert topic in out
-    assert 'pubsub.topics.publish' in out
+    assert "pubsub.topics.publish" in out
 
 
 def test_check_subscription_permissions(subscription, capsys):
@@ -108,4 +115,4 @@ def test_check_subscription_permissions(subscription, capsys):
     out, _ = capsys.readouterr()
 
     assert subscription in out
-    assert 'pubsub.subscriptions.consume' in out
+    assert "pubsub.subscriptions.consume" in out