def test_url(self, mock_blob, mock_bucket):
mock_blob.public_url = MagicMock()
s = Storage()
s.url('test.jpg')
mock_blob.public_url.call_count == 1
def test_exists(self, mock_blob, mock_bucket):
mock_blob.exists = MagicMock()
s = Storage()
s.url('test.jpg')
mock_blob.exists.call_count == 1