def assert_has_paths(test_case, expected_paths, parent_path):
    missing_paths = []
    for path in expected_paths:
        if not parent_path.preauthChild(path).exists():
            missing_paths.append(path)
        if missing_paths:
            test_case.fail('Missing paths: {}'.format(missing_paths))
Fail if any of the ``expected_paths`` are not existing relative paths of
dataset/ETHPy150Open ClusterHQ/flocker/admin/test/test_packaging.py/assert_has_paths