def test_reverse(self, size):
        l = [1, 2, 3, 4, 5] * size
        l.reverse()
        self.assertEquals(len(l), size * 5)
        self.assertEquals(l[-5:], [5, 4, 3, 2, 1])
        self.assertEquals(l[:5], [5, 4, 3, 2, 1])