def test_unbind_parent():
node_1 = Node(name="I", altitude=100)
node_2 = Node(name="II", altitude=200)
node_1.bind_parent(node_2)
assert node_1.parent is node_2
node_1.unbind_parent()
assert node_1.parent is None
assert node_2.left is None
# Try to unbind a parent to a node who don't hve a parent => work
node_1.unbind_parent()
node_2.unbind_parent()
def test_bind_parent():
node_1 = Node(name="III", altitude=300)
node_2 = Node(name="IV", altitude=400)
node_3 = Node(name="V", altitude=500)
node_3.bind_parent(node_2)
assert node_3.parent == node_2
assert node_2.left == node_3
# Try to bind a parent to a node who already have a parent
with pytest.raises(AssertionError):
node_3.bind_parent(node_1)
node_4 = Node()
with pytest.raises(AssertionError):
node_4.bind_parent(node_4)