def test_delete_root_node(self):
tree = Tree()
tree.add_child(5)
tree.add_child(4)
tree.add_child(6)
tree.delete(5)
self.assertEqual(tree.display_preorder(), [6, 4])
self.assertEqual(tree.display_inorder(), [4, 6])
def test_delete_not_in_the_tree(self):
tree = Tree()
tree.add_child(5)
tree.add_child(2)
tree.add_child(7)
self.assertEqual(tree.display_preorder(), [5, 2, 7])
tree.delete(6)
self.assertEqual(tree.display_preorder(), [5, 2, 7])
def test_display_postorder(self):
tree = Tree()
tree.add_child(5)
tree.add_child(2)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
tree.add_child(0)
tree.add_child(8)
tree.add_child(3)
self.assertEqual(tree.display_postorder(),
[5, 7, 9, 8, 6, 2, 4, 3, 1, 0])
def test_display_inorder(self):
tree = Tree()
tree.add_child(5)
tree.add_child(2)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
tree.add_child(0)
tree.add_child(8)
tree.add_child(3)
self.assertEqual(tree.display_inorder(),
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
def test_delete_node_with_children(self):
tree = Tree()
tree.add_child(5)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
tree.add_child(8)
self.assertEqual(tree.display_preorder(), [5, 1, 4, 7, 6, 9, 8])
tree.delete(7)
self.assertEqual(tree.display_preorder(), [5, 1, 4, 8, 6, 9])
tree.delete(8)
self.assertEqual(tree.display_preorder(), [5, 1, 4, 9, 6])
def test_get_parent(self):
tree = Tree()
tree.add_child(5)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
self.assertEqual(tree.get_parent(7), 5)
def test_delete_node_without_child(self):
tree = Tree()
tree.add_child(5)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
tree.add_child(8)
self.assertEqual(tree.display_preorder(), [5, 1, 4, 7, 6, 9, 8])
self.assertEqual(tree.display_inorder(), [1, 4, 5, 6, 7, 8, 9])
tree.delete(4)
self.assertEqual(tree.display_preorder(), [5, 1, 7, 6, 9, 8])
self.assertEqual(tree.display_inorder(), [1, 5, 6, 7, 8, 9])
tree.delete(8)
self.assertEqual(tree.display_preorder(), [5, 1, 7, 6, 9])
self.assertEqual(tree.display_inorder(), [1, 5, 6, 7, 9])
def test_find_not_in_tree(self):
tree = Tree()
tree.add_child(5)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
self.assertEqual(tree.find(8), False)
self.assertEqual(tree.find(2), False)
def test_find_in_tree(self):
tree = Tree()
tree.add_child(5)
tree.add_child(1)
tree.add_child(4)
tree.add_child(7)
tree.add_child(9)
tree.add_child(6)
self.assertEqual(tree.find(4), True)
self.assertEqual(tree.find(6), True)
def test_add_child(self):
tree = Tree("Electronics")
tree.add_child("laptop")
tree.add_child("cellphone")
tree.add_child("tv")
self.assertIsNotNone(tree.children)
def test_tree_add_child_already_in_tree(self):
tree = Tree()
tree.add_child(5)
tree.add_child(2)
tree.add_child(4)
self.assertEqual(tree.add_child(2), False)
def test_tree_add_children(self):
tree = Tree()
tree.add_child(5)
tree.add_child(2)
tree.add_child(4)
self.assertEqual(tree.display_preorder()[1:], [2, 4])
def test_add_child(self):
tree = Tree()
tree.add_child(5)
self.assertEqual(tree.add_child(2), True)
def test_tree_root(self):
tree = Tree()
tree.add_child(5)
self.assertEqual(tree.root.value, 5)
