ApiResult failedResult = new ApiResult.ApiResponse().status(Status.FAILED).result();
        assertNotNull(failedResult);

        // Test SYSTEM_ERROR status
        ApiResult systemErrorResult = new ApiResult.ApiResponse().status(Status.SYSTEM_ERROR).result();
        assertNotNull(systemErrorResult);
    }

    // Test API result with messages
    @Test
    public void test_apiResultWithMessages() {

        /** Successful response status. */
        OK(0),
        /** Bad request status indicating client error. */
        BAD_REQUEST(1),
        /** System error status indicating server error. */
        SYSTEM_ERROR(2),
        /** Unauthorized status indicating authentication failure. */
        UNAUTHORIZED(3),
        /** General failure status. */
        FAILED(9);

        private final int id;

    @Test
    public void test_Status_BAD_REQUEST() {
        assertEquals(1, Status.BAD_REQUEST.getId());
    }

    @Test
    public void test_Status_SYSTEM_ERROR() {
        assertEquals(2, Status.SYSTEM_ERROR.getId());
    }