response.setExpiration(expiration);

            assertEquals(expiration, response.getExpiration());
        }

        @Test
        @DisplayName("Should handle null expiration")
        void testNullExpiration() {
            response.setExpiration(null);

            assertNull(response.getExpiration());
        }
    }

    @Nested
    @DisplayName("Async Handling Tests")

            assertEquals(expiration, echoResponse.getExpiration());
        }

        @Test
        @DisplayName("Should handle null expiration")
        void testNullExpiration() {
            Long expiration = 1000L;
            echoResponse.setExpiration(expiration);
            assertEquals(expiration, echoResponse.getExpiration());

            echoResponse.setExpiration(null);