def METHOD_NAME(self, notify_on_new_thread_reply_mock):
    """endpoint mentions author"""
    response = self.client.post(
        self.post_link, data={"post": "This is test response, @%s!" % self.user}
    )
    self.assertEqual(response.status_code, 200)
    post = self.user.post_set.order_by("id").last()
    self.assertEqual(post.mentions.count(), 1)
    self.assertEqual(post.mentions.all()[0], self.user)