test spring 5 reactive rest service - spring

Question

I'm using SpringBoot 2 and Spring 5 (RC1) to expose reactive REST services. but I can't manage to write unit test for those controllers.
Here is my controller
#Api
#RestController
#RequestMapping("/")
public class MyController {
#Autowired
private MyService myService;
#RequestMapping(path = "/", method = RequestMethod.GET)
public Flux<MyModel> getPages(#RequestParam(value = "id", required = false) String id,
#RequestParam(value = "name", required = false) String name) throws Exception {
return myService.getMyModels(id, name);
}
}
myService is calling a database so I would like not to call the real one. (I don't wan't integration testing)
Edit :
I found a way that could match my need but I can't make it work :
#Before
public void setup() {
client = WebTestClient.bindToController(MyController.class).build();
}
#Test
public void getPages() throws Exception {
client.get().uri("/").exchange().expectStatus().isOk();
}
But I'm getting 404, seems it can't find my controller

Answer 1

You have to pass actual controller instance to bindToController method.
As you want to test mock environment, you'll need to mock your dependencies, for example using Mockito.
public class MyControllerReactiveTest {
private WebTestClient client;
#Before
public void setup() {
client = WebTestClient
.bindToController(new MyController(new MyService()))
.build();
}
#Test
public void getPages() throws Exception {
client.get()
.uri("/")
.exchange()
.expectStatus().isOk();
}
}
More test examples you can find here.
Also, I suggest switching to constructor-based DI.