def test_03_insert(self):
tree = Node(6)
for i in (4, 7, 9, 12, 1, 0, 3):
tree.insert(i)
self.assertEqual(tree.to_list(), self.LIST)
def test_08_calc_bf(self):
tree = Node(100)
self.assertEqual(tree.calc_bf(), 0)
tree.insert(50)
self.assertEqual(tree.calc_bf(), 1)
tree.insert(30)
self.assertEqual(tree.calc_bf(), 2)
tree.insert(60)
self.assertEqual(tree.calc_bf(), 2)
tree.insert(150)
self.assertEqual(tree.calc_bf(), 1)
tree.insert(170)
self.assertEqual(tree.calc_bf(), 0)
tree.insert(130)
self.assertEqual(tree.calc_bf(), 0)
