def test_node_0_tree(self):
"""Test subtree for index 0 """
test_result = get_tree_by_id(node_id=5) # not 5 does not exist
self.assertEqual(test_result, None)
def test_node_4_tree(self):
"""Test subtree for index 4 """
test_result = get_tree_by_id(node_id=4)
self.assertDictEqual(test_result, self.node_4_tree_correct_result)