@Autowired objects are null only when testing

Question

My question has to do with the application set-up, not mocking or using autowiring. See the answer for more details.

I\'m trying to set up a Spring Boot application

Answer 1

standaloneSetup is used for unit tests. But it seems like you are doing integrations tests, so the below code should work - I have not tested it.

Replace

@Before
public void setup() throws Exception {
    mockMvc = standaloneSetup(new MetricAPI()).build();
}

with

@Autowired
private WebApplicationContext wac;

@Before
public void setup() throws Exception {
    mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
}

and add this to your test class:

@WebAppConfiguration

Bonus

@RunWith(SpringRunner.class) tells JUnit to run using Spring’s testing support. SpringRunner is the new name for SpringJUnit4ClassRunner, it’s just a bit easier on the eye.