add extra test

Author: rambleraptor

tests/catalog/test_rest.py

@@ -1748,3 +1748,42 @@ def test_drop_view_204(rest_mock: Mocker) -> None:
         request_headers=TEST_HEADERS,
     )
     RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN).drop_view(("some_namespace", "some_view"))
+
+
+@mock.patch("google.auth.transport.requests.Request")
+@mock.patch("google.auth.load_credentials_from_file")
+def test_rest_catalog_with_google_credentials_path(
+    mock_load_creds: mock.MagicMock, mock_google_request: mock.MagicMock, rest_mock: Mocker
+) -> None:
+    mock_credentials = mock.MagicMock()
+    mock_credentials.token = "file_token"
+    mock_load_creds.return_value = (mock_credentials, "test_project_file")
+
+    # Given
+    rest_mock.get(
+        f"{TEST_URI}v1/config",
+        json={"defaults": {}, "overrides": {}},
+        status_code=200,
+    )
+    # Given
+    catalog_properties = {
+        "uri": TEST_URI,
+        "auth": {
+            "type": "google",
+            "google": {
+                "credentials_path": "/fake/path.json",
+            },
+        },
+    }
+    catalog = RestCatalog("rest", **catalog_properties)  # type: ignore
+    assert catalog.uri == TEST_URI
+
+    expected_auth_header = "Bearer file_token"
+    assert rest_mock.last_request.headers["Authorization"] == expected_auth_header
+
+    mock_load_creds.assert_called_with("/fake/path.json", scopes=None)
+    mock_credentials.refresh.assert_called_once_with(mock_google_request.return_value)
+    history = rest_mock.request_history
+    assert len(history) == 1
+    actual_headers = history[0].headers
+    assert actual_headers["Authorization"] == expected_auth_header