Add tests for KMS quickstart (#756)

conftest.py

@@ -14,6 +14,7 @@
 
 import os
 
+import mock
 import pytest
 import requests
 
@@ -71,3 +72,21 @@ def remote_resource(cloud_config):
 
     return lambda path, tmpdir: fetch_gcs_resource(
         remote_uri + path.strip('/'), tmpdir)
+
+
+@pytest.fixture
+def api_client_inject_project_id(cloud_config):
+    """Patches all googleapiclient requests to replace 'YOUR_PROJECT_ID' with
+    the project ID from cloud_config."""
+    import googleapiclient.http
+
+    class ProjectIdInjectingHttpRequest(googleapiclient.http.HttpRequest):
+        def __init__(self, http, postproc, uri, *args, **kwargs):
+            uri = uri.replace('YOUR_PROJECT_ID', cloud_config.project)
+            super(ProjectIdInjectingHttpRequest, self).__init__(
+                http, postproc, uri, *args, **kwargs)
+
+    with mock.patch(
+            'googleapiclient.http.HttpRequest',
+            new=ProjectIdInjectingHttpRequest):
+        yield

kms/api/quickstart.py

@@ -25,10 +25,10 @@ def run_quickstart():
     # Lists keys in the "global" location.
     location = 'global'
 
-    # Instantiates a client
+    # Creates an API client for the KMS API.
     kms_client = discovery.build('cloudkms', 'v1beta1')
 
-    # The resource name of the location associated with the KeyRings
+    # The resource name of the location associated with the key rings.
     parent = 'projects/{}/locations/{}'.format(project_id, location)
 
     # Lists key rings

kms/api/quickstart_test.py

@@ -0,0 +1,21 @@
+# Copyright 2017 Google Inc. All Rights Reserved.
+#
+# 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.
+
+
+def test_quickstart(api_client_inject_project_id, capsys):
+    import quickstart
+
+    quickstart.run_quickstart()
+    out, _ = capsys.readouterr()
+    assert 'No key rings found' in out