def METHOD_NAME():
    child = os.path.join("path", "to", "folder")
    assert path_isin(child, os.path.join("path", "to", ""))
    assert path_isin(child, os.path.join("path", "to"))
    assert path_isin(child, os.path.join("path", ""))
    assert path_isin(child, os.path.join("path"))