def test_count_users_by_target(self, target_id, user_id):
     CollectRecipe.insert(user_id, target_id)
     assert CollectRecipe.count_users_by_target(target_id) == 1
     CollectRecipe.delete(user_id, target_id)
     assert CollectRecipe.count_users_by_target(target_id) == 0