def test_reverseKGroup_moreswap(self):
link = TestHelper.generateLinkList([1, 2, 3, 4, 5])
solution = Solution()
result = solution.reverseKGroup(link, 3)
AssertHelper.assertLinkList([3, 2, 1, 4, 5], result)
def test_reverseKGroup_noswap(self):
link = TestHelper.generateLinkList([1, 2, 3, 4])
solution = Solution()
result = solution.reverseKGroup(link, 1)
AssertHelper.assertLinkList([1, 2, 3, 4], result)
def test_reverseKGroup_onlyOne(self):
link = TestHelper.generateLinkList([1])
solution = Solution()
result = solution.reverseKGroup(link, 2)
AssertHelper.assertLinkList([1], result)
def test_reverseKGroup_Odd(self):
link = TestHelper.generateLinkList([1, 2, 3])
solution = Solution()
result = solution.reverseKGroup(link, 2)
AssertHelper.assertLinkList([2, 1, 3], result)
def test_reverseKGroup_empty(self):
solution = Solution()
result = solution.reverseKGroup(None, 0)
self.assertEqual(None, result)