def test_user_add_problem_with_tag(self):
"""测试用户的添加错题功能（带标签）"""
u = User()
p = Problem(author=u)
t = Tag(owner=u)
t.add_problem(p)
self.assertIn(p, t.problems.all())
def test_user_add_problem_with_tag_but_deleted(self):
"""测试用户的添加错题功能（带标签，但错题在标签加入后被移除了）"""
u = User()
p = Problem(author=u)
t = Tag(owner=u)
t.add_problem(p)
t.remove_problem(p)
self.assertNotIn(p, t.problems.all())
def test_user_find_problem_with_tag(self):
"""测试用户根据标签寻找错题的功能"""
u = User()
p = Problem(author=u)
t = Tag(owner=u)
t.add_problem(p)
self.assertEqual(0, t.find_problem(p))
t.remove_problem(p)
self.assertIsNone(t.find_problem(p))
