fix: Add async context manager return types (#385)

* fix: Add async context manager return types

chore: Mock return_value should not populate oneof message fields

chore: Support snippet generation for services that only support REST transport

chore: Update gapic-generator-python to v1.11.0
PiperOrigin-RevId: 545430278

Source-Link: googleapis/googleapis@601b532

Source-Link: https://github.com/googleapis/googleapis-gen/commit/b3f18d0f6560a855022fd058865e7620479d7af9
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google/cloud/container_v1/services/cluster_manager/async_client.py

@@ -4697,7 +4697,7 @@ async def sample_check_autopilot_compatibility():
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ClusterManagerAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/container_v1beta1/services/cluster_manager/async_client.py

@@ -4884,7 +4884,7 @@ async def sample_list_locations():
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ClusterManagerAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

tests/unit/gapic/container_v1/test_cluster_manager.py

@@ -9923,9 +9923,11 @@ async def test_list_usable_subnetworks_async_pages():
             RuntimeError,
         )
         pages = []
-        async for page_ in (
+        # Workaround issue in python 3.9 related to code coverage by adding `# pragma: no branch`
+        # See https://github.com/googleapis/gapic-generator-python/pull/1174#issuecomment-1025132372
+        async for page_ in (  # pragma: no branch
             await client.list_usable_subnetworks(request={})
-        ).pages:  # pragma: no branch
+        ).pages:
             pages.append(page_)
         for page_, token in zip(pages, ["abc", "def", "ghi", ""]):
             assert page_.raw_page.next_page_token == token

tests/unit/gapic/container_v1beta1/test_cluster_manager.py

@@ -10035,9 +10035,11 @@ async def test_list_usable_subnetworks_async_pages():
             RuntimeError,
         )
         pages = []
-        async for page_ in (
+        # Workaround issue in python 3.9 related to code coverage by adding `# pragma: no branch`
+        # See https://github.com/googleapis/gapic-generator-python/pull/1174#issuecomment-1025132372
+        async for page_ in (  # pragma: no branch
             await client.list_usable_subnetworks(request={})
-        ).pages:  # pragma: no branch
+        ).pages:
             pages.append(page_)
         for page_, token in zip(pages, ["abc", "def", "ghi", ""]):
             assert page_.raw_page.next_page_token == token