def METHOD_NAME(test, params, env):
    """
    Do stream base on itself
    test steps:
        1. boot VM with a data image
        2. add snapshot images
        3. create a file(base) on data image
        4. take snapshots(data->sn1->sn2),
           take one snapshot, create one new file(snx, x=1,2,3)
        5. restart VM with the sn2
        6. do stream base on itself
    :param test: test object
    :param params: test configuration dict
    :param env: env object
    """
    stream_test = BlockdevStreamBaseitself(test, params, env)
    stream_test.run_test()