def test_printProgressBarNoProgress(self):
        """
        L{StdioClient._printProgressBar} prints a progress description that
        indicates 0 bytes transferred if no bytes have been transferred and no
        time has passed.
        """
        self.setKnownConsoleSize(10, 34)
        clock = self.client.reactor = Clock()
        wrapped = BytesIO(b"x")
        wrapped.name = b"sample"
        wrapper = cftp.FileWrapper(wrapped)
        startTime = clock.seconds()

        self.client._printProgressBar(wrapper, startTime)

        if _PY3:
            result = b"\rb'sample'  0% 0.0B 0.0Bps 00:00 "
        else:
            result = "\rsample  0% 0.0B 0.0Bps 00:00 "
        self.assertEqual(self.client.transport.value(), result)

        L{StdioClient._printProgressBar} prints a progress description that
        indicates 0 bytes transferred if no bytes have been transferred and no
        time has passed.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_cftp.py