'``DockerImage.__repr__`` includes the repository and tag.'

def test_repr(self):

    image = repr(DockerImage(repository=u'clusterhq/flocker', tag=u'release-14.0'))
    self.assertEqual([image.startswith('DockerImage'), ('clusterhq/flocker' in image), ('release-14.0' in image)], [True, True, True])
