Spring test invalid configuration - spring-boot

Question

I have a simple REST controller that I'm trying to test, the test looks like this:
#RunWith(SpringRunner.class)
#SpringBootTest
#WebAppConfiguration
public class ModelControllerTests {
private MediaType contentType = MediaType.APPLICATION_JSON_UTF8;
private HttpMessageConverter jacksonConverter;
private MockMvc mockMvc;
#Mock
private ModelService service;
#InjectMocks
private ModelController controller;
#Autowired
private WebApplicationContext context;
#Autowired
void setConverters(HttpMessageConverter<?>[] converters) {
jacksonConverter = Arrays.stream(converters)
.filter(hmc -> hmc instanceof MappingJackson2HttpMessageConverter)
.findAny()
.orElse(null);
assertNotNull(jacksonConverter);
}
#Before
public void setUp() {
MockitoAnnotations.initMocks(this);
mockMvc = standaloneSetup(controller)
.build();
}
#Test
public void postModel_returnsModel() throws Exception {
when(service.doSomething(any())).thenReturn(new Model("cde", null));
mockMvc.perform(post("/model")
.content(json(new Model("abc", null)))
.contentType(contentType))
.andDo(print())
.andExpect(status().isOk())
.andExpect(content().json("{\"notEmpty\":\"abc\"}", true));
}
private String json(Object o) throws IOException {
var responseMessage = new MockHttpOutputMessage();
jacksonConverter.write(o, MediaType.APPLICATION_JSON_UTF8, responseMessage);
return responseMessage.getBodyAsString();
}
}
Now I've got a problem with dependencies and configuration, I've got the following line in my application.properties: spring.jackson.default-property-inclusion=non_null, which works fine when using the normal mockMvc (webAppContextSetup), however I wanted to mock ModelService (which is autowired in ModelController.
When using standaloneSetup to create MockMvc instance there seems to be no configuration, fields that are set to null are returned and furthermore it seems that the ModelService annotated with #Mock is not the same as the one in ModelController, therefore when postModel_returnsModel it's using the wrong service.
How can I solve this?