pytest捕获ExceptionInfo对象中的异常.您可以在例外之后比较确切的类型.

pytest captures the exception in an ExceptionInfo object. You can compare the exact type after the exception.

def test_get_holidays_raises_ioerror():
    requests.get.side_effect = IOError
    with pytest.raises(IOError) as excinfo:
        get_holidays()
    assert type(excinfo.value) is IOError