def METHOD_NAME():
    if not os.name == 'nt':
        path_components0 = ['','','documents','test','test.py']
        path_components1 = ['','','documents','projects','test','test.py']
    else:
        path_components0 = ['c:','','documents','test','test.py']
        path_components1 = ['c:','','documents','projects','test','test.py']
    diff_path0 = os.path.join(*['test'])
    diff_path1 = os.path.join(*['projects','test'])
    assert sourcecode.differentiate_prefix(
                        path_components0, path_components1) ==  diff_path0
    assert sourcecode.differentiate_prefix(
                        path_components1, path_components0) ==  diff_path1