def METHOD_NAME(self):
    data = (((1, 'C'), (5, 'B')),
            ((2, 'A', None, (5, 6, 7)), (6, 'C')),
            ((3, 'C'), (7, 'D')),
            ((4, 'B'), (8, 'D')))
    result = self._1u1d_no_change(data)
    self.assertEqual(result, self.draw(data))
    return self.draw(data)