def test_sort(self, size):
        l = [1, 2, 3, 4, 5] * size
        l.sort()
        self.assertEquals(len(l), size * 5)
        self.assertEquals(l.count(1), size)
        self.assertEquals(l[:10], [1] * 10)
        self.assertEquals(l[-10:], [5] * 10)