test_qrcode.py 文件源码

def test_print_tty_stdout(self):
        qr = qrcode.QRCode()
        with mock.patch('sys.stdout') as fake_stdout:
            fake_stdout.isatty.return_value = None
            self.assertRaises(OSError, qr.print_tty)
            self.assertTrue(fake_stdout.isatty.called)