Add tests to contrib modules to restore coverage to 100%

tests/contrib/test_appengine.py

@@ -1008,6 +1008,17 @@ class DecoratorTests(unittest2.TestCase):
         # This is never set, but it's consistent with other tests.
         self.assertFalse(decorator._in_error)
 
+    def test_invalid_state(self):
+        with mock.patch.object(appengine, '_parse_state_value',
+                               return_value=None, autospec=True):
+            # Now simulate the callback to /oauth2callback.
+            response = self.app.get('/oauth2callback', {
+                'code': 'foo_access_code',
+                'state': 'foo_path:xsrfkey123',
+            })
+            self.assertEqual('200 OK', response.status)
+            self.assertEqual('The authorization request failed', response.body)
+
 
 class DecoratorXsrfSecretTests(unittest2.TestCase):
     """Test xsrf_secret_key."""

tests/contrib/test_sqlalchemy.py

@@ -68,21 +68,21 @@ class TestSQLAlchemyStorage(unittest2.TestCase):
 
     def test_get(self):
         session = self.session()
+        credentials_storage = oauth2client.contrib.sqlalchemy.Storage(
+            session=session,
+            model_class=DummyModel,
+            key_name='key',
+            key_value=1,
+            property_name='credentials',
+        )
+        self.assertIsNone(credentials_storage.get())
         session.add(DummyModel(
             key=1,
             credentials=self.credentials,
         ))
         session.commit()
 
-        credentials = oauth2client.contrib.sqlalchemy.Storage(
-            session=session,
-            model_class=DummyModel,
-            key_name='key',
-            key_value=1,
-            property_name='credentials',
-        ).get()
-
-        self.compare_credentials(credentials)
+        self.compare_credentials(credentials_storage.get())
 
     def test_put(self):
         session = self.session()