1 files changed, 44 insertions, 0 deletions
diff --git a/system_tests/system_tests_sync/test_urllib3.py b/system_tests/system_tests_sync/test_urllib3.py
new file mode 100644
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+++ b/system_tests/system_tests_sync/test_urllib3.py
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+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import google.auth
+import google.auth.credentials
+import google.auth.transport.requests
+from google.oauth2 import service_account
+
+
+def test_authorized_session_with_service_account_and_self_signed_jwt():
+    credentials, project_id = google.auth.default()
+
+    credentials = credentials.with_scopes(
+        scopes=[],
+        default_scopes=["https://www.googleapis.com/auth/pubsub"],
+    )
+
+    http = google.auth.transport.urllib3.AuthorizedHttp(
+        credentials=credentials, default_host="pubsub.googleapis.com"
+    )
+
+    # List Pub/Sub Topics through the REST API
+    # https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics/list
+    response = http.urlopen(
+        method="GET",
+        url="https://pubsub.googleapis.com/v1/projects/{}/topics".format(project_id)
+    )
+
+    assert response.status == 200
+
+    # Check that self-signed JWT was created and is being used
+    assert credentials._jwt_credentials is not None
+    assert credentials._jwt_credentials.token == credentials.token