def test_find_node(self):
category = Category('data/category.yaml')
self.assertIsNone(category.find_node('no'))
self.assertEqual({'name': '캐릭터'}, category.find_node('캐릭터'))
def test_all_children(self):
category = Category('data/category.yaml')
node = category.find_node('문장')
self.assertEqual(['문장'], category.all_children(node))
