feat(spanner): add client_options to constructor

spanner/google/cloud/spanner_v1/client.py

@@ -110,6 +110,10 @@ class Client(ClientWithProject):
     :param user_agent:
         (Deprecated) The user agent to be used with API request.
         Not used.
+    :type client_options: :class:`~google.api_core.client_options.ClientOptions`
+        or :class:`dict`
+    :param client_options: (Optional) Client options used to set user options
+        on the client. API Endpoint should be set through client_options.
 
     :raises: :class:`ValueError <exceptions.ValueError>` if both ``read_only``
              and ``admin`` are :data:`True`
@@ -124,7 +128,12 @@ class Client(ClientWithProject):
     """The scopes required for Google Cloud Spanner."""
 
     def __init__(
-        self, project=None, credentials=None, client_info=_CLIENT_INFO, user_agent=None
+        self,
+        project=None,
+        credentials=None,
+        client_info=_CLIENT_INFO,
+        user_agent=None,
+        client_options=None,
     ):
         # NOTE: This API has no use for the _http argument, but sending it
         #       will have no impact since the _http() @property only lazily
@@ -133,6 +142,7 @@ def __init__(
             project=project, credentials=credentials, _http=None
         )
         self._client_info = client_info
+        self._client_options = client_options
 
         if user_agent is not None:
             warnings.warn(_USER_AGENT_DEPRECATED, DeprecationWarning, stacklevel=2)
@@ -172,7 +182,9 @@ def instance_admin_api(self):
         """Helper for session-related API calls."""
         if self._instance_admin_api is None:
             self._instance_admin_api = InstanceAdminClient(
-                credentials=self.credentials, client_info=self._client_info
+                credentials=self.credentials,
+                client_info=self._client_info,
+                client_options=self._client_options,
             )
         return self._instance_admin_api
 
@@ -181,7 +193,9 @@ def database_admin_api(self):
         """Helper for session-related API calls."""
         if self._database_admin_api is None:
             self._database_admin_api = DatabaseAdminClient(
-                credentials=self.credentials, client_info=self._client_info
+                credentials=self.credentials,
+                client_info=self._client_info,
+                client_options=self._client_options,
             )
         return self._database_admin_api
 

spanner/google/cloud/spanner_v1/database.py

@@ -177,8 +177,11 @@ def spanner_api(self):
             if isinstance(credentials, google.auth.credentials.Scoped):
                 credentials = credentials.with_scopes((SPANNER_DATA_SCOPE,))
             client_info = self._instance._client._client_info
+            client_options = self._instance._client._client_options
             self._spanner_api = SpannerClient(
-                credentials=credentials, client_info=client_info
+                credentials=credentials,
+                client_info=client_info,
+                client_options=client_options,
             )
         return self._spanner_api
 

spanner/tests/unit/test_client.py

@@ -55,6 +55,7 @@ def _constructor_test_helper(
         expected_creds=None,
         client_info=None,
         user_agent=None,
+        client_options=None,
     ):
         from google.cloud.spanner_v1 import client as MUT
 
@@ -79,6 +80,7 @@ def _constructor_test_helper(
         self.assertEqual(client.project, self.PROJECT)
         self.assertIs(client._client_info, expected_client_info)
         self.assertEqual(client.user_agent, user_agent)
+        self.assertEqual(client._client_options, client_options)
 
     def test_constructor_default_scopes(self):
         from google.cloud.spanner_v1 import client as MUT
@@ -130,8 +132,12 @@ def test_instance_admin_api(self):
 
         credentials = _make_credentials()
         client_info = mock.Mock()
+        client_options = mock.Mock()
         client = self._make_one(
-            project=self.PROJECT, credentials=credentials, client_info=client_info
+            project=self.PROJECT,
+            credentials=credentials,
+            client_info=client_info,
+            client_options=client_options,
         )
         expected_scopes = (SPANNER_ADMIN_SCOPE,)
 
@@ -146,7 +152,9 @@ def test_instance_admin_api(self):
         self.assertIs(again, api)
 
         instance_admin_client.assert_called_once_with(
-            credentials=credentials.with_scopes.return_value, client_info=client_info
+            credentials=credentials.with_scopes.return_value,
+            client_info=client_info,
+            client_options=client_options,
         )
 
         credentials.with_scopes.assert_called_once_with(expected_scopes)
@@ -156,8 +164,12 @@ def test_database_admin_api(self):
 
         credentials = _make_credentials()
         client_info = mock.Mock()
+        client_options = mock.Mock()
         client = self._make_one(
-            project=self.PROJECT, credentials=credentials, client_info=client_info
+            project=self.PROJECT,
+            credentials=credentials,
+            client_info=client_info,
+            client_options=client_options,
         )
         expected_scopes = (SPANNER_ADMIN_SCOPE,)
 
@@ -172,7 +184,9 @@ def test_database_admin_api(self):
         self.assertIs(again, api)
 
         database_admin_client.assert_called_once_with(
-            credentials=credentials.with_scopes.return_value, client_info=client_info
+            credentials=credentials.with_scopes.return_value,
+            client_info=client_info,
+            client_options=client_options,
         )
 
         credentials.with_scopes.assert_called_once_with(expected_scopes)