Adding test coverage for client.py.

- `DeviceFlowInfo` (and using datetime now patch).
- Corner cases for `step1_get_authorize_url` and
  `step2_exchange`
- Failure cases for `flow_from_clientsecrets`
- `verify_id_token` when the cached HTTP is used (i.e.
  the default argument)

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/test_jwt.py b/tests/test_jwt.py
index 38d28c7..93010ca 100644
--- a/tests/test_jwt.py
+++ b/tests/test_jwt.py
@@ -17,6 +17,8 @@
 import os
 import tempfile
 import time
+
+import mock
 import unittest2
 
 from .http_mock import HttpMockSequence
@@ -129,6 +131,20 @@ class CryptTests(unittest2.TestCase):
         self.assertEqual('billy bob', contents['user'])
         self.assertEqual('data', contents['metadata']['meta'])
 
+    def test_verify_id_token_with_certs_uri_default_http(self):
+        jwt = self._create_signed_jwt()
+
+        http = HttpMockSequence([
+            ({'status': '200'}, datafile('certs.json')),
+        ])
+
+        with mock.patch('oauth2client.client._cached_http', new=http):
+            contents = verify_id_token(
+                jwt, 'some_audience_address@testing.gserviceaccount.com')
+
+        self.assertEqual('billy bob', contents['user'])
+        self.assertEqual('data', contents['metadata']['meta'])
+
     def test_verify_id_token_with_certs_uri_fails(self):
         jwt = self._create_signed_jwt()