class SolutionTest(unittest.TestCase):
def setUp(self):
self.sol = Solution()
def test_1(self):
l = [1, 2, 3]
self.sol.nextPermutation(l)
self.assertEqual(l, [1, 3, 2])
def test_2(self):
l = [1, 2, 3, 2, 1]
self.sol.nextPermutation(l)
self.assertEqual(l, [1, 3, 1, 2, 2])
def test_3(self):
l = [3, 2, 1, 1, 1]
self.sol.nextPermutation(l)
self.assertEqual(l, [1, 1, 1, 2, 3])
