def test_breadth_on_big_left_branch():
tree = BinaryTree()
tree.add(1)
tree.root.left = Node(2)
tree.root.left.left = Node(3)
tree.root.left.left.left = Node(4)
tree.root.left.left.left.left = Node(5)
assert tree.breadth_traverse() == [1, 2, 3, 4, 5]
def test_breadth_balanced_negative_tree():
tree = BinaryTree()
tree.add(-1)
tree.root.left = Node(-2)
tree.root.left.left = Node(-4)
tree.root.left.right = Node(-5)
tree.root.right = Node(-3)
tree.root.right.left = Node(-6)
tree.root.right.right = Node(-7)
assert tree.breadth_traverse() == [-1, -2, -3, -4, -5, -6, -7]
def test_breadth_balanced_tree():
tree = BinaryTree()
tree.add(1)
tree.root.left = Node(2)
tree.root.left.left = Node(4)
tree.root.left.right = Node(5)
tree.root.right = Node(3)
tree.root.right.left = Node(6)
tree.root.right.right = Node(7)
assert tree.breadth_traverse() == [1, 2, 3, 4, 5, 6, 7]
def test_breadth_on_small_tree():
tree = BinaryTree()
tree.add(1)
tree.add(2)
tree.add(3)
assert tree.breadth_traverse() == [1, 2, 3]
def test_breadth_on_empty_tree():
tree = BinaryTree()
with pytest.raises(Exception) as e:
tree.breadth_traverse()
assert str(e.value) == "tree is empty"