def testCase1(self):
root = deserialize("2,1,3")
invert = self.s.invertTree(root)
expect = serialize(invert)
self.assertEqual(expect, "2,3,1")
def testCase3(self):
root = deserialize("4,2,7,1,3,6,9")
invert = self.s.invertTree(root)
expect = serialize(invert)
self.assertEqual(expect, "4,7,2,9,6,3,1")
def test_case5(self):
head = createListFromArray([1, 3])
root = self.s.sortedListToBST(head)
serialized_tree = serialize(root)
self.assertEqual(serialized_tree, '3,1')
def testCase2(self):
root = deserialize("")
invert = self.s.invertTree(root)
expect = serialize(invert)
self.assertEqual(expect, "")
def test_case1(self):
head = createListFromArray([-10, -3, 0, 5, 9])
root = self.s.sortedListToBST(head)
serialized_tree = serialize(root)
self.assertEqual(serialized_tree, '0,-3,9,-10,null,5')