test_utils.py 文件源码

def test_writing_to_broken_stderr_is_output_after_returning(self, sys):
        def sample(**kwargs):
            kwargs['stderr'].write('Output')
            # The output isn't written until we return
            sys.stderr.write.assert_not_called()
        sys.stderr.fileno.side_effect = io.UnsupportedOperation
        utils.wrap_subprocess_call(sample)(stderr=None)
        sys.stderr.write.assert_called_once_with('Output')