fix(gapic): mock os.path.exists in mTLS tests to support newer google auth

packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2

@@ -174,13 +174,13 @@ def test__get_default_mtls_endpoint():
 
 def test__read_environment_variables():
     assert {{ service.client_name }}._read_environment_variables() == (False, "auto", None)
-    
+
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_CLIENT_CERTIFICATE": "true"}):
         assert {{ service.client_name }}._read_environment_variables() == (True, "auto", None)
-    
+
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_CLIENT_CERTIFICATE": "false"}):
         assert {{ service.client_name }}._read_environment_variables() == (False, "auto", None)
-    
+
     with mock.patch.dict(
         os.environ, {"GOOGLE_API_USE_CLIENT_CERTIFICATE": "Unsupported"}
     ):
@@ -200,10 +200,10 @@ def test__read_environment_variables():
 
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_MTLS_ENDPOINT": "never"}):
         assert {{ service.client_name }}._read_environment_variables() == (False, "never", None)
-    
+
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_MTLS_ENDPOINT": "always"}):
         assert {{ service.client_name }}._read_environment_variables() == (False, "always", None)
-    
+
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_MTLS_ENDPOINT": "auto"}):
         assert {{ service.client_name }}._read_environment_variables() == (False, "auto", None)
 
@@ -293,7 +293,7 @@ def test_use_client_cert_effective():
             assert {{ service.client_name }}._use_client_cert_effective() is False
 
     # Test case 12: Test when `should_use_client_cert` is available and the
-    # `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is unset. Also, 
+    # `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is unset. Also,
     # the GOOGLE_API_CONFIG environment variable is unset.
     if  hasattr(google.auth.transport.mtls, "should_use_client_cert"):
         with mock.patch.dict(os.environ, {"GOOGLE_API_USE_CLIENT_CERTIFICATE": ""}):
@@ -303,7 +303,7 @@ def test_use_client_cert_effective():
 def test__get_client_cert_source():
     mock_provided_cert_source = mock.Mock()
     mock_default_cert_source = mock.Mock()
-    
+
     assert {{ service.client_name }}._get_client_cert_source(None, False) is None
     assert {{ service.client_name }}._get_client_cert_source(mock_provided_cert_source, False) is None
     assert {{ service.client_name }}._get_client_cert_source(mock_provided_cert_source, True) == mock_provided_cert_source
@@ -867,7 +867,7 @@ def test_{{ service.client_name|snake_case }}_get_mtls_endpoint_and_cert_source(
             )
             assert api_endpoint == mock_api_endpoint
             assert cert_source is None
-   
+
     # Test cases for mTLS enablement when GOOGLE_API_USE_CLIENT_CERTIFICATE is unset.
     test_cases = [
         (
@@ -900,7 +900,7 @@ def test_{{ service.client_name|snake_case }}_get_mtls_endpoint_and_cert_source(
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -929,10 +929,10 @@ def test_{{ service.client_name|snake_case }}_get_mtls_endpoint_and_cert_source(
                 },
             },
             mock_client_cert_source,
-        ),   
+        ),
         (
             # With workloads not present in config, mTLS is disabled.
-            {   
+            {
                 "version": 1,
                 "cert_configs": {},
             },
@@ -947,7 +947,7 @@ def test_{{ service.client_name|snake_case }}_get_mtls_endpoint_and_cert_source(
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -994,7 +994,7 @@ def test_{{ service.client_name|snake_case }}_get_mtls_endpoint_and_cert_source(
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_MTLS_ENDPOINT": "Unsupported"}):
         with pytest.raises(MutualTLSChannelError) as excinfo:
             client_class.get_mtls_endpoint_and_cert_source()
-        
+
         assert str(excinfo.value) == "Environment variable `GOOGLE_API_USE_MTLS_ENDPOINT` must be `never`, `auto` or `always`"
 
 @pytest.mark.parametrize("client_class", [
@@ -1059,7 +1059,7 @@ def test_{{ service.client_name|snake_case }}_client_api_endpoint(client_class):
     with mock.patch.dict(os.environ, {"GOOGLE_API_USE_MTLS_ENDPOINT": "never"}):
         client = client_class(client_options=options, credentials=ga_credentials.AnonymousCredentials())
         assert client.api_endpoint == default_endpoint
-        
+
 
 @pytest.mark.parametrize("client_class,transport_class,transport_name", [
     {% if 'grpc' in opts.transport %}

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

@@ -700,7 +700,7 @@ def test_asset_service_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -747,7 +747,7 @@ def test_asset_service_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/credentials/tests/unit/gapic/credentials_v1/test_iam_credentials.py

@@ -690,7 +690,7 @@ def test_iam_credentials_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -737,7 +737,7 @@ def test_iam_credentials_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/eventarc/tests/unit/gapic/eventarc_v1/test_eventarc.py

@@ -721,7 +721,7 @@ def test_eventarc_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -768,7 +768,7 @@ def test_eventarc_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging/tests/unit/gapic/logging_v2/test_config_service_v2.py

@@ -678,7 +678,7 @@ def test_config_service_v2_client_get_mtls_endpoint_and_cert_source(client_class
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -725,7 +725,7 @@ def test_config_service_v2_client_get_mtls_endpoint_and_cert_source(client_class
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging/tests/unit/gapic/logging_v2/test_logging_service_v2.py

@@ -679,7 +679,7 @@ def test_logging_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -726,7 +726,7 @@ def test_logging_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging/tests/unit/gapic/logging_v2/test_metrics_service_v2.py

@@ -677,7 +677,7 @@ def test_metrics_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -724,7 +724,7 @@ def test_metrics_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging_internal/tests/unit/gapic/logging_v2/test_config_service_v2.py

@@ -678,7 +678,7 @@ def test_base_config_service_v2_client_get_mtls_endpoint_and_cert_source(client_
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -725,7 +725,7 @@ def test_base_config_service_v2_client_get_mtls_endpoint_and_cert_source(client_
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging_internal/tests/unit/gapic/logging_v2/test_logging_service_v2.py

@@ -679,7 +679,7 @@ def test_logging_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -726,7 +726,7 @@ def test_logging_service_v2_client_get_mtls_endpoint_and_cert_source(client_clas
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/logging_internal/tests/unit/gapic/logging_v2/test_metrics_service_v2.py

@@ -677,7 +677,7 @@ def test_base_metrics_service_v2_client_get_mtls_endpoint_and_cert_source(client
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -724,7 +724,7 @@ def test_base_metrics_service_v2_client_get_mtls_endpoint_and_cert_source(client
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):

packages/gapic-generator/tests/integration/goldens/redis/tests/unit/gapic/redis_v1/test_cloud_redis.py

@@ -708,7 +708,7 @@ def test_cloud_redis_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):
@@ -755,7 +755,7 @@ def test_cloud_redis_client_get_mtls_endpoint_and_cert_source(client_class):
                     config_filename = "mock_certificate_config.json"
                     config_file_content = json.dumps(config_data)
                     m = mock.mock_open(read_data=config_file_content)
-                    with mock.patch("builtins.open", m):
+                    with mock.patch("builtins.open", m), mock.patch("os.path.exists", side_effect=lambda path: os.path.basename(path) == config_filename):
                         with mock.patch.dict(
                             os.environ, {"GOOGLE_API_CERTIFICATE_CONFIG": config_filename}
                         ):