def test_print_two_nodes_right():
x = BinaryNode()
x.value = 10
x.right_node = BinaryNode()
x.right_node.value = 15
print x.to_string()
assert x.to_string() == "Value: 10\nRight node->Value: 15"
def test_print_three_nodes_even():
x = BinaryNode()
x.value = 10
x.left_node = BinaryNode()
x.left_node.value = 5
x.right_node = BinaryNode()
x.right_node.value = 15
print x.to_string()
assert x.to_string(
) == "Value: 10\nLeft node->Value: 5\nRight node->Value: 15"
def test_print_four_nodes():
x = BinaryNode()
x.value = 10
x.left_node = BinaryNode()
x.left_node.value = 5
x.right_node = BinaryNode()
x.right_node.value = 15
x.left_node.left_node = BinaryNode()
x.left_node.left_node.value = 1
print x.to_string()
assert x.to_string(
) == "Value: 10\nLeft node->Value: 5\nLeft node->Value: 1\nRight node->Value: 15"