chore: fix mock runtime warnings (#2085)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: daniel-sanche

packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2

@@ -230,8 +230,9 @@ def test_{{ method_name }}_use_cached_wrapped_rpc():
         assert mock_rpc.call_count == 1
 
         {% if method.lro or method.extended_lro %}
-        # Operation methods build a cached wrapper on first rpc call
-        # subsequent calls should use the cached wrapper
+        # Operation methods call wrapper_fn to build a cached
+        # client._transport.operations_client instance on first rpc call.
+        # Subsequent calls should use the cached wrapper
         wrapper_fn.reset_mock()
         {% endif %}
 
@@ -321,8 +322,9 @@ async def test_{{ method_name }}_async_use_cached_wrapped_rpc(transport: str = "
         assert client._client._transport.{{method.transport_safe_name|snake_case}} in client._client._transport._wrapped_methods
 
         # Replace cached wrapped function with mock
-        mock_object = mock.AsyncMock()
-        client._client._transport._wrapped_methods[client._client._transport.{{method.transport_safe_name|snake_case}}] = mock_object
+        mock_rpc = mock.AsyncMock()
+        mock_rpc.return_value = mock.Mock()
+        client._client._transport._wrapped_methods[client._client._transport.{{method.transport_safe_name|snake_case}}] = mock_rpc
 
         {% if method.client_streaming %}
         request = [{}]
@@ -333,11 +335,12 @@ async def test_{{ method_name }}_async_use_cached_wrapped_rpc(transport: str = "
         {% endif %}
 
         # Establish that the underlying gRPC stub method was called.
-        assert mock_object.call_count == 1
+        assert mock_rpc.call_count == 1
 
         {% if method.lro or method.extended_lro %}
-        # Operation methods build a cached wrapper on first rpc call
-        # subsequent calls should use the cached wrapper
+        # Operation methods call wrapper_fn to build a cached
+        # client._transport.operations_client instance on first rpc call.
+        # Subsequent calls should use the cached wrapper
         wrapper_fn.reset_mock()
         {% endif %}
 
@@ -349,7 +352,7 @@ async def test_{{ method_name }}_async_use_cached_wrapped_rpc(transport: str = "
 
         # Establish that a new wrapper was not created for this call
         assert wrapper_fn.call_count == 0
-        assert mock_object.call_count == 2
+        assert mock_rpc.call_count == 2
 
 @pytest.mark.asyncio
 async def test_{{ method_name }}_async(transport: str = 'grpc_asyncio', request_type={{ method.input.ident }}):

packages/gapic-generator/tests/integration/goldens/asset/tests/unit/gapic/asset_v1/test_asset_service.py

@@ -913,20 +913,21 @@ async def test_generate_access_token_async_use_cached_wrapped_rpc(transport: str
         assert client._client._transport.generate_access_token in client._client._transport._wrapped_methods
 
         # Replace cached wrapped function with mock
-        mock_object = mock.AsyncMock()
-        client._client._transport._wrapped_methods[client._client._transport.generate_access_token] = mock_object
+        mock_rpc = mock.AsyncMock()
+        mock_rpc.return_value = mock.Mock()
+        client._client._transport._wrapped_methods[client._client._transport.generate_access_token] = mock_rpc
 
         request = {}
         await client.generate_access_token(request)
 
         # Establish that the underlying gRPC stub method was called.
-        assert mock_object.call_count == 1
+        assert mock_rpc.call_count == 1
 
         await client.generate_access_token(request)
 
         # Establish that a new wrapper was not created for this call
         assert wrapper_fn.call_count == 0
-        assert mock_object.call_count == 2
+        assert mock_rpc.call_count == 2
 
 @pytest.mark.asyncio
 async def test_generate_access_token_async(transport: str = 'grpc_asyncio', request_type=common.GenerateAccessTokenRequest):
@@ -1291,20 +1292,21 @@ async def test_generate_id_token_async_use_cached_wrapped_rpc(transport: str = "
         assert client._client._transport.generate_id_token in client._client._transport._wrapped_methods
 
         # Replace cached wrapped function with mock
-        mock_object = mock.AsyncMock()
-        client._client._transport._wrapped_methods[client._client._transport.generate_id_token] = mock_object
+        mock_rpc = mock.AsyncMock()
+        mock_rpc.return_value = mock.Mock()
+        client._client._transport._wrapped_methods[client._client._transport.generate_id_token] = mock_rpc
 
         request = {}
         await client.generate_id_token(request)
 
         # Establish that the underlying gRPC stub method was called.
-        assert mock_object.call_count == 1
+        assert mock_rpc.call_count == 1
 
         await client.generate_id_token(request)
 
         # Establish that a new wrapper was not created for this call
         assert wrapper_fn.call_count == 0
-        assert mock_object.call_count == 2
+        assert mock_rpc.call_count == 2
 
 @pytest.mark.asyncio
 async def test_generate_id_token_async(transport: str = 'grpc_asyncio', request_type=common.GenerateIdTokenRequest):
@@ -1674,20 +1676,21 @@ async def test_sign_blob_async_use_cached_wrapped_rpc(transport: str = "grpc_asy
         assert client._client._transport.sign_blob in client._client._transport._wrapped_methods
 
         # Replace cached wrapped function with mock
-        mock_object = mock.AsyncMock()
-        client._client._transport._wrapped_methods[client._client._transport.sign_blob] = mock_object
+        mock_rpc = mock.AsyncMock()
+        mock_rpc.return_value = mock.Mock()
+        client._client._transport._wrapped_methods[client._client._transport.sign_blob] = mock_rpc
 
         request = {}
         await client.sign_blob(request)
 
         # Establish that the underlying gRPC stub method was called.
-        assert mock_object.call_count == 1
+        assert mock_rpc.call_count == 1
 
         await client.sign_blob(request)
 
         # Establish that a new wrapper was not created for this call
         assert wrapper_fn.call_count == 0
-        assert mock_object.call_count == 2
+        assert mock_rpc.call_count == 2
 
 @pytest.mark.asyncio
 async def test_sign_blob_async(transport: str = 'grpc_asyncio', request_type=common.SignBlobRequest):
@@ -2051,20 +2054,21 @@ async def test_sign_jwt_async_use_cached_wrapped_rpc(transport: str = "grpc_asyn
         assert client._client._transport.sign_jwt in client._client._transport._wrapped_methods
 
         # Replace cached wrapped function with mock
-        mock_object = mock.AsyncMock()
-        client._client._transport._wrapped_methods[client._client._transport.sign_jwt] = mock_object
+        mock_rpc = mock.AsyncMock()
+        mock_rpc.return_value = mock.Mock()
+        client._client._transport._wrapped_methods[client._client._transport.sign_jwt] = mock_rpc
 
         request = {}
         await client.sign_jwt(request)
 
         # Establish that the underlying gRPC stub method was called.
-        assert mock_object.call_count == 1
+        assert mock_rpc.call_count == 1
 
         await client.sign_jwt(request)
 
         # Establish that a new wrapper was not created for this call
         assert wrapper_fn.call_count == 0
-        assert mock_object.call_count == 2
+        assert mock_rpc.call_count == 2
 
 @pytest.mark.asyncio
 async def test_sign_jwt_async(transport: str = 'grpc_asyncio', request_type=common.SignJwtRequest):