@Test
        @DisplayName("Should get and set async handled")
        void testAsyncHandled() {
            assertFalse(response.isAsyncHandled());

            response.setAsyncHandled(true);

            assertTrue(response.isAsyncHandled());
        }
    }

    @Nested
    @DisplayName("Error Code Tests")
    class ErrorCodeTests {

        @Test

        void testAsyncOperations() {
            assertFalse(echoResponse.isAsyncHandled());

            echoResponse.setAsyncHandled(true);

            assertTrue(echoResponse.isAsyncHandled());

            echoResponse.setAsyncHandled(false);

            assertFalse(echoResponse.isAsyncHandled());
        }
    }

    @Nested
    @DisplayName("Expiration Tests")