Tests: Remove shared subscriptions across parallel tests

samples/snippets/publisher_test.py

@@ -28,13 +28,18 @@
 import publisher
 
 
+# This uuid is shared across tests which run in parallel.
 UUID = uuid.uuid4().hex
 PROJECT_ID = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC_ID = "publisher-test-topic-" + UUID
 SUBSCRIPTION_ID = "publisher-test-subscription-" + UUID
 # Allow 60s for tests to finish.
 MAX_TIME = 60
 
+# These tests run in parallel if pytest-parallel is installed.
+# Avoid modifying resources that are shared across tests,
+# as this results in test flake.
+
 if typing.TYPE_CHECKING:
     from unittest.mock import AsyncMock, MagicMock
 

samples/snippets/schema_test.py

@@ -31,6 +31,7 @@
 
 import schema
 
+# This uuid is shared across tests which run in parallel.
 UUID = uuid.uuid4().hex
 try:
     PROJECT_ID = os.environ["GOOGLE_CLOUD_PROJECT"]
@@ -45,6 +46,10 @@
 AVSC_FILE = "resources/us-states.avsc"
 PROTO_FILE = "resources/us-states.proto"
 
+# These tests run in parallel if pytest-parallel is installed.
+# Avoid modifying resources that are shared across tests,
+# as this results in test flake.
+
 
 @pytest.fixture(scope="module")
 def schema_client() -> Generator[pubsub_v1.SchemaServiceClient, None, None]: