Using #RestClientTest in spring boot test - spring-boot

Question

I want to write a simple test using #RestClientTest for the component below (NOTE: I can do it without using #RestClientTest and mocking dependent beans which works fine.).
#Slf4j
#Component
#RequiredArgsConstructor
public class NotificationSender {
private final ApplicationSettings settings;
private final RestTemplate restTemplate;
public ResponseEntity<String> sendNotification(UserNotification userNotification)
throws URISyntaxException {
// Some modifications to request message as required
return restTemplate.exchange(new RequestEntity<>(userNotification, HttpMethod.POST, new URI(settings.getNotificationUrl())), String.class);
}
}
And the test;
#RunWith(SpringRunner.class)
#RestClientTest(NotificationSender.class)
#ActiveProfiles("local-test")
public class NotificationSenderTest {
#MockBean
private ApplicationSettings settings;
#Autowired
private MockRestServiceServer server;
#Autowired
private NotificationSender messageSender;
#Test
public void testSendNotification() throws Exception {
String url = "/test/notification";
UserNotification userNotification = buildDummyUserNotification();
when(settings.getNotificationUrl()).thenReturn(url);
this.server.expect(requestTo(url)).andRespond(withSuccess());
ResponseEntity<String> response = messageSender.sendNotification(userNotification );
assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
}
private UserNotification buildDummyUserNotification() {
// Build and return a sample message
}
}
But i get error that No qualifying bean of type 'org.springframework.web.client.RestTemplate' available. Which is right of course as i havn't mocked it or used #ContextConfiguration to load it.
Isn't #RestClientTest configures a RestTemplate? or i have understood it wrong?

Answer 1

Found it! Since i was using a bean that has a RestTemplate injected directly, we have to add #AutoConfigureWebClient(registerRestTemplate = true) to the test which solves this.
This was in the javadoc of #RestClientTest which i seem to have ignored previously.
Test which succeeds;
#RunWith(SpringRunner.class)
#RestClientTest(NotificationSender.class)
#ActiveProfiles("local-test")
#AutoConfigureWebClient(registerRestTemplate = true)
public class NotificationSenderTest {
#MockBean
private ApplicationSettings settings;
#Autowired
private MockRestServiceServer server;
#Autowired
private NotificationSender messageSender;
#Test
public void testSendNotification() throws Exception {
String url = "/test/notification";
UserNotification userNotification = buildDummyUserNotification();
when(settings.getNotificationUrl()).thenReturn(url);
this.server.expect(requestTo(url)).andRespond(withSuccess());
ResponseEntity<String> response = messageSender.sendNotification(userNotification );
assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
}
private UserNotification buildDummyUserNotification() {
// Build and return a sample message
}
}