Can not execute controller test with #SpringBootTest - spring

Question

I have a Spring Boot application. Version is 2.3.1.
Main Application looks like:
#AllArgsConstructor
#SpringBootApplication
public class LocalServiceApplication implements CommandLineRunner {
private final DataService dataService;
private final QrReaderServer qrReaderServer;
private final MonitoringService monitoringService;
#Override
public void run(String... args) {
dataService.fetchData();
monitoringService.launchMonitoring();
qrReaderServer.launchServer();
}
public static void main(String[] args) {
SpringApplication.run(LocalServiceApplication.class, args);
}
}
After the application is started I have to execute 3 distinct steps which have done with CommandLineRunner:
first gets remote data and store it locally (for test profile this step is skipped)
start async folder monitoring for file uploads with WatchService.
launch TCP server
I have a controller like:
#Slf4j
#RestController
#AllArgsConstructor
#RequestMapping("/v1/permissions")
public class CarParkController {
private final PermissionService permissionService;
#PostMapping
public CarParkPermission createPermission(#RequestBody #Valid CarParkPermission permission) {
return permissionService.createPermission(permission);
}
}
Ant test with Junit 5 looks like:
#ActiveProfiles("test")
#AutoConfigureMockMvc
#SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
class CarParkControllerIntegrationTest {
#Autowired
private MockMvc mockMvc;
#MockBean
private PermissionService permissionService;
private final Gson gson = new Gson();
#Test
void testCreatingNewPermissionSuccess() throws Exception {
CarParkPermission permission = CarParkPermission.builder()
.id(56)
.permissionCode("1234")
.build();
when(permissionService.createPermission(refEq(permission))).thenReturn(permission);
postPermission(permission).andExpect(status().isOk());
}
private <T> ResultActions postPermission(T instance) throws Exception {
return this.mockMvc.perform(post("/v1/permissions")
.contentType(MediaType.APPLICATION_JSON)
.content(gson.toJson(instance)));
}
}
Looks like it should work fine.
However, the test isn't executed:
2020-08-27 14:42:30.308 INFO 21800 --- [ main] c.s.i.CarParkControllerIntegrationTest : Started CarParkControllerIntegrationTest in 8.593 seconds (JVM running for 10.03)
2020-08-27 14:42:30.334 INFO 21800 --- [ main] c.s.s.s.DataServiceTestImpl : Fetch data for test profile is skipped
2020-08-27 14:42:30.336 DEBUG 21800 --- [ carpark-ex-1] c.s.monitoring.MonitoringServiceImpl : START_MONITORING Results from Cameras for folder: D:\results-from-camera
2020-08-27 14:42:30.751 DEBUG 21800 --- [ main] c.s.netty.TCPServer : TCP Server is STARTED : port 9090
After those lines execution hangs up forever.
UPDATE
Here are details for monitoring task:
#Async
#Override
public void launchMonitoring() {
log.debug("START_MONITORING Results from Cameras for folder: {}", properties.getFolder());
try {
WatchKey key;
while ((key = watchService.take()) != null) {
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind<?> kind = event.kind();
if (kind == ENTRY_CREATE) {
log.info("FILE_CREATED: {}", event.context());
// processing resource
deleteResource(zipFullPath);
} else if (kind == ENTRY_DELETE) {
log.info("RESOURCE_DELETED: {}", event.context());
}
}
key.reset();
}
} catch (InterruptedException e) {
log.error("interrupted exception for monitoring service", e);
Thread.currentThread().interrupt();
}
}
Also AsyncConfiguration is configured with TaskExecutor.
Launch method from TCPServer looks:
#Override
public void launchServer() {
try {
ChannelFuture serverChannelFuture = serverBootstrap.bind(hostAddress).sync();
log.debug("TCP Server is STARTED : port {}", hostAddress.getPort());
serverChannel = serverChannelFuture.channel().closeFuture().sync().channel();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} finally {
shutdownQuietly();
}
}
How to solve this issue?

Answer 1

Have understood that execution is blocked (thanks to M.Deinum).
So changed the last method for:
#Async
#Override
public void launchServer() {
// ...
}
And shifted to ObjectMapper instead of Gson for converting instance to JSON format:
#SpringBootTest
#AutoConfigureMockMvc
#ActiveProfiles("test")
class CarParkControllerIntegrationTest {
#Autowired
private MockMvc mockMvc;
#Autowired
private ObjectMapper mapper;
#Test
void testCreatingNewPermissionSuccess() throws Exception {
CarParkPermission permission = CarParkPermission.builder()
.id(444)
.permissionCode("1234")
.build();
postPermission(permission).andExpect(status().isOk());
}
private <T> ResultActions postPermission(T instance) throws Exception {
return this.mockMvc.perform(post("/v1/permissions")
.contentType(MediaType.APPLICATION_JSON)
.content(mapper.writeValueAsString(instance)));
}
}
And finally, it works fine.