👀 Views: 96 💬 Answers: 1 📅 Created: 2025-06-17

spring-boot testing resttemplate Java

I'm trying to implement I'm not sure how to approach I'm using Spring Boot 2.6.4 and I've set up a global exception handler using `@ControllerAdvice` to handle specific exceptions and return custom error responses... However, when I run integration tests with `TestRestTemplate`, it seems to be ignoring these custom error responses and returning default HTTP status codes without the expected body. My controller looks like this: ```java @RestController @RequestMapping("/api") public class MyController { @GetMapping("/data/{id}") public ResponseEntity<MyData> getData(@PathVariable Long id) { if (id <= 0) { throw new IllegalArgumentException("Invalid ID"); } MyData data = dataService.findById(id); return ResponseEntity.ok(data); } } ``` And my exception handler is defined like this: ```java @ControllerAdvice public class GlobalExceptionHandler { @ExceptionHandler(IllegalArgumentException.class) public ResponseEntity<CustomErrorResponse> handleIllegalArgumentException(IllegalArgumentException e) { CustomErrorResponse response = new CustomErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value()); return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST); } } ``` In my test, I'm using `TestRestTemplate` as follows: ```java @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT) public class MyControllerIntegrationTest { @Autowired private TestRestTemplate restTemplate; @Test public void testGetDataWithInvalidId() { ResponseEntity<CustomErrorResponse> response = restTemplate.getForEntity("/api/data/-1", CustomErrorResponse.class); assertEquals(HttpStatus.BAD_REQUEST, response.getStatusCode()); assertNotNull(response.getBody()); assertEquals("Invalid ID", response.getBody().getMessage()); } } ``` When I run this test, it seems to return a `400 Bad Request` status but without the custom error response body I defined, and the `response.getBody()` comes back as `null`. I verified that the exception handler is properly being triggered via logging. Is there something I'm missing related to how the `TestRestTemplate` processes the responses? Any advice on how to ensure the custom error response is returned correctly in my integration tests? I recently upgraded to Java 3.9. I'm open to any suggestions. This is happening in both development and production on Windows 11.