test_utils.py 文件源码

def test_writing_to_stdout_is_diverted_if_broken(self, sys):
        def sample(**kwargs):
            assert kwargs['stdin'] is None
            assert kwargs['stdout'] is not None
            assert kwargs['stdout'] is not sys.stdout
        sys.stdout.fileno.side_effect = io.UnsupportedOperation
        utils.wrap_subprocess_call(sample)(stdin=None, stdout=None)