def test(self):
        if os.path.exists(TEST_FILE_NAME):
            os.remove(TEST_FILE_NAME)

        buffer = queue.read_list()

        result = queue.key_exists("frog", buffer)

        self.assertEqual(result, False)

        queue.add_key("frog")

        new_buffer = queue.read_list()
        new_assert = queue.key_exists("frog", new_buffer)
        self.assertEqual(new_assert, True)
    def test(self):
        output = open(TEST_FILE_NAME, "wt")
        output.write("apple\n")
        output.write("ball\n")
        output.close()

        buffer = queue.read_list()

        result = queue.key_exists("frog", buffer)

        self.assertEqual(result, False)

        queue.add_key("frog")

        new_buffer = queue.read_list()
        new_assert = queue.key_exists("frog", new_buffer)
        self.assertEqual(new_assert, True)