Testing a controller with an auto wired component is null when calling the controller from a test case

Question

I have a controller

@RestController
public class Create {

    @Autowired
    private ComponentThatDoesSomething something;

    @RequestMapping(\"/greeting\         


        

Answer 1

Use Mockito and inject a mock that you create. I would prefer constructor injection:

@RestController
public class Create {

    private ComponentThatDoesSomething something;

    @Autowired
    public Create(ComponentThatDoesSomething c) {
        this.something = c;
    }
}

Don't use Spring in your Junit tests.

public CreateTest {

    private Create create;

    @Before
    public void setUp() {
        ComponentThatDoesSomething c = Mockito.mock(ComponentThatDoesSomething .class);
        this.create = new Create(c);
    } 
}