def test_new_right_and_left(self):
root = Node()
root.set_root()
right = root.new_right()
left = root.new_left()
self.assertEqual(right.sibling, left)
self.assertEqual(left.sibling, right)
def test_new_right(self):
root = Node()
root.set_root()
right = root.new_right()
self.assertTrue(root.has_right())
self.assertFalse(root.has_left())
self.assertEqual(root.right, right)
self.assertEqual(right.parent, root)
self.assertFalse(root.is_leaf())
self.assertFalse(right.is_root())
self.assertTrue(right.is_leaf())
self.assertEqual('right', right.position)
def test_set_left1(self):
c = Node()
c.set_root()
plus = c.new_left()
d = c.new_right()
a = plus.new_left()
b = plus.new_right()
c.set_left(a)
self.assertEqual('left', a.position)
self.assertEqual(c.left, a)
self.assertEqual(a.parent, c)
self.assertEqual(a.sibling, d)
self.assertEqual(d.sibling, a)
def test_set_right2(self):
c = Node()
c.set_root()
d = c.new_left()
plus = c.new_right()
a = plus.new_left()
b = plus.new_right()
c.set_right(b)
self.assertEqual('right', b.position)
self.assertEqual(c.right, b)
self.assertEqual(b.parent, c)
self.assertEqual(b.sibling, d)
self.assertEqual(d.sibling, b)
