Method invocation exception when using spring mvc test

Question

I have a @RestController defined for updating Person class as:

@RestController
@RequestMapping("/api/person")
class PersonRestController {

    @Autowired
    private IPersonService mPersonService;

    @PostMapping("/update")
    public Person updatePerson(@RequestBody Person person) {
        Optional<Person> personIfExists = mPersonService.findOneIfExists(person.id);
        if (!personIfExists.isPresent()) {
            throw new IllegalArgumentException();
        }
        return mPersonService.update(personIfExists.get());
    }
}

For brevity, lets assume that there exists a IPersonService and its proper implementation. The implementation is marked with @Service and is on the spring boot component scan path. I am using JMockit, TestNG and Spring MVC Test frameworks for testing this controller. I am also using GSON for converting Person object to JSON. Here is my test method:

@Test
    public void testUpdateFileDetails() throws Exception {
        Person person = new Person();
        person.id = "P01";
        person.name = "SOME_PERSON_NAME";
        person.age = 99;

        new Expectations() {{
            mockedPersonService.findOneIfExists("P01");
            result = new IllegalArgumentException();
        }};

        String personJson = new Gson().toJson(person);

        mvc.perform(post("/api/person/update").content(personJson))
                .andExpect(status().is4xxClientError());
    }

When I run this test case, I keep getting following exception:

Missing 1 invocation to:
        com.mytestapplication.services.api.IPersonService#getFileDetails("P01")
        on mock instance: com.mytestapplication.services.api.$Impl_IPersonServcie@8c11eee

        Caused by: Missing invocations
        at com.mytestapplication.rest.api.PersonRestControllerTest$2.<init>(PersonRestControllerTest.java:<line_number>)
        at com.mytestapplication.rest.api.PersonRestControllerTest.testUpdatePerson(PersonRestControllerTest.java:<line_number>)

Here refers to the line containing statement: new Expectations() {{ ... }}

Can you please help me in identifying the cause of this exception?

score 0 · Answer 1 · answered Aug 14 '18 at 11:21

0

It looks like you need to provide mock for method call to

mPersonService.update(personIfExists.get());

which is return statement of your controller method.

Also I believe that method also has another method call to getFileDetails in the service.

So if provide mock for both these method calls, your test should work.

answered Aug 14 '18 at 11:21

Japan Trivedi

4,445
2
23
44

Ok. But in my answer I'm asking to mock the method calls for IPersonServive.. Try to provide mock for method calls mPersonService.update and personIfExist.get() – Japan Trivedi Sep 17 '18 at 12:23

Method invocation exception when using spring mvc test

1 Answers1