I introduce the way to test async method by changing async to sync task executor.
@Service
@Slf4j
public class TestServiceImpl implements TestService {
@Autowired
private RestTemplate restTemplate;
@Override
@Async
public void getString() {
log.info("start");
restTemplate.getForEntity("http://www.test.com", String.class);
}
}
We will test this async method as above.
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class TestServiceTest {
@Configuration
@Import(AsyncTestApplication.class)
static class ContextConfiguration {
@Bean
@Primary
public Executor executor() {
return new SyncTaskExecutor();
}
}
@Autowired
private TestService testService;
@MockBean
private RestTemplate restTemplate;
@Test
public void testGetString() {
//given
given(restTemplate.getForEntity(anyString(), eq(String.class))).willReturn(new ResponseEntity(HttpStatus.OK));
//when
testService.getString();
//then
verify(restTemplate, times(1)).getForEntity(anyString(), eq(String.class));
}
}
By using Configuration annotation, you can set the junit test config.
I will change the asyncExecutor to syncTaskExecutor,so that we could check the internal logic of async method.
2018-03-01 15:54:47.729 INFO 6836 --- [ main] o.b.test.service.impl.TestServiceImpl : start
You can find your test case passed.
You can download whole project from below git url.
https://gitlab.com/shashaka/async-junit-test-project
