def test_delete_leaf(animal):
cat = animal.get('cat')
lion = animal.get('lion')
animal.delete('lion')
assert lion not in cat._children
assert lion._parent is None
def test_delete_from_the_middle(animal):
cat = animal.get('cat')
lion = animal.get('lion')
animal.delete('cat/lion')
assert lion not in cat._children
assert lion._parent is None
def test_delete_3_nodes_path(animal):
cat = animal.get('cat')
lion = animal.get('lion')
animal.delete('mammal/cat/lion')
assert lion not in cat._children
assert lion._parent is None
def test_delete_2_nodes_path(animal):
mammal = animal.get('mammal')
cat = animal.get('cat')
animal.delete('mammal/cat')
assert cat not in mammal._children
assert cat._parent is None
def test_delete_1_node_path(animal):
animal.delete('mammal')
assert animal._children == []
def test_delete_root(animal):
with pytest.raises(RootDeleteError):
animal.delete('animal')