test: test default_host

google/api_core/grpc_helpers.py

@@ -183,8 +183,7 @@ def _create_composite_credentials(
         scopes=None,
         ssl_credentials=None,
         quota_project_id=None,
-        default_host=None
-    ):
+        default_host=None):
     """Create the composite credentials for secure channels.
 
     Args:
@@ -216,13 +215,18 @@ def _create_composite_credentials(
             "'credentials' and 'credentials_file' are mutually exclusive."
         )
 
-
     if credentials_file:
-        credentials, _ = google.auth.load_credentials_from_file(credentials_file,
-            scopes=scopes, default_scopes=default_scopes)
+        credentials, _ = google.auth.load_credentials_from_file(
+            credentials_file,
+            scopes=scopes,
+            default_scopes=default_scopes
+        )
     elif credentials:
-        credentials = google.auth.credentials.with_scopes_if_required(credentials,
-            scopes=scopes, default_scopes=default_scopes)
+        credentials = google.auth.credentials.with_scopes_if_required(
+            credentials,
+            scopes=scopes,
+            default_scopes=default_scopes
+        )
     else:
         credentials, _ = google.auth.default(scopes=scopes, default_scopes=default_scopes)
 

tests/asyncio/test_grpc_helpers_async.py

@@ -277,6 +277,30 @@ def test_create_channel_implicit(grpc_secure_channel, default, composite_creds_c
     grpc_secure_channel.assert_called_once_with(target, composite_creds)
 
 
+@mock.patch("google.auth.transport.grpc.AuthMetadataPlugin")
+@mock.patch(
+    "google.auth.transport.requests.Request",
+    return_value=mock.sentinel.Request
+)
+@mock.patch("grpc.composite_channel_credentials")
+@mock.patch(
+    "google.auth.default",
+    return_value=(mock.sentinel.credentials, mock.sentinel.projet),
+)
+@mock.patch("grpc.experimental.aio.secure_channel")
+def test_create_channel_implicit_with_default_host(grpc_secure_channel, default, composite_creds_call, request, auth_metadata_plugin):
+    target = "example.com:443"
+    default_host = "example.com"
+    composite_creds = composite_creds_call.return_value
+
+    channel = grpc_helpers_async.create_channel(target, default_host=default_host)
+
+    assert channel is grpc_secure_channel.return_value
+    default.assert_called_once_with(scopes=None, default_scopes=None)
+    auth_metadata_plugin.assert_called_once_with(mock.sentinel.credentials, mock.sentinel.Request, default_host=default_host)
+    grpc_secure_channel.assert_called_once_with(target, composite_creds)
+
+
 @mock.patch("grpc.composite_channel_credentials")
 @mock.patch(
     "google.auth.default",
@@ -402,7 +426,6 @@ def test_create_channel_explicit_default_scopes(grpc_secure_channel, composite_c
     grpc_secure_channel.assert_called_once_with(target, composite_creds)
 
 
-
 @mock.patch("grpc.composite_channel_credentials")
 @mock.patch("grpc.experimental.aio.secure_channel")
 def test_create_channel_explicit_with_quota_project(grpc_secure_channel, composite_creds_call):

tests/unit/test_grpc_helpers.py

@@ -239,6 +239,34 @@ def test_create_channel_implicit(grpc_secure_channel, default, composite_creds_c
         grpc_secure_channel.assert_called_once_with(target, composite_creds)
 
 
+@mock.patch("google.auth.transport.grpc.AuthMetadataPlugin")
+@mock.patch(
+    "google.auth.transport.requests.Request",
+    return_value=mock.sentinel.Request
+)
+@mock.patch("grpc.composite_channel_credentials")
+@mock.patch(
+    "google.auth.default",
+    return_value=(mock.sentinel.credentials, mock.sentinel.project),
+)
+@mock.patch("grpc.secure_channel")
+def test_create_channel_implicit_with_default_host(grpc_secure_channel, default, composite_creds_call, request, auth_metadata_plugin):
+    target = "example.com:443"
+    default_host = "example.com"
+    composite_creds = composite_creds_call.return_value
+
+    channel = grpc_helpers.create_channel(target, default_host=default_host)
+
+    assert channel is grpc_secure_channel.return_value
+    default.assert_called_once_with(scopes=None, default_scopes=None)
+    auth_metadata_plugin.assert_called_once_with(mock.sentinel.credentials, mock.sentinel.Request, default_host=default_host)
+
+    if grpc_helpers.HAS_GRPC_GCP:
+        grpc_secure_channel.assert_called_once_with(target, composite_creds, None)
+    else:
+        grpc_secure_channel.assert_called_once_with(target, composite_creds)
+
+
 @mock.patch("grpc.composite_channel_credentials")
 @mock.patch(
     "google.auth.default",
@@ -355,7 +383,7 @@ def test_create_channel_explicit_scoped(grpc_secure_channel, composite_creds_cal
         grpc_secure_channel.assert_called_once_with(target, composite_creds, None)
     else:
         grpc_secure_channel.assert_called_once_with(target, composite_creds)
-   
+
 
 @mock.patch("grpc.composite_channel_credentials")
 @mock.patch("grpc.secure_channel")
@@ -479,7 +507,6 @@ def test_create_channel_with_credentials_file_and_default_scopes(load_credential
         grpc_secure_channel.assert_called_once_with(target, composite_creds)
 
 
-
 @pytest.mark.skipif(
     not grpc_helpers.HAS_GRPC_GCP, reason="grpc_gcp module not available"
 )