def test_get_registry_url_official(image):
    ret = Containers.get_registry_url(image)
    assert ret == 'https://index.docker.io/v1/'
def test_get_registry_url_custom():
    image = 'cloud.canister.io:5000/repository/image'
    ret = Containers.get_registry_url(image)
    assert ret == 'cloud.canister.io:5000'