selftest.py 文件源码

def load_tests(loader, tests, pattern):
    """
    Add tests within doctests so that the unittest runner picks them up.

    See https://docs.python.org/3.5/library/unittest.html#load-tests-protocol
    """
    etl_modules = sorted(mod for mod in sys.modules if mod.startswith("etl"))
    logger.info("Adding tests from %s", etl.names.join_with_quotes(etl_modules))
    for mod in etl_modules:
        tests.addTests(doctest.DocTestSuite(mod))
    return tests