Injecting a String property with @InjectMocks

Question

I have a Spring MVC @Controller with this constructor:

@Autowired public AbcController(XyzService xyzService, @Value("${my.property}") String myProperty) {/*...*/} 

I want to write a standalone unit test for this Controller:

@RunWith(MockitoJUnitRunner.class) public class AbcControllerTest {      @Mock     private XyzService mockXyzService;      private String myProperty = "my property value";      @InjectMocks     private AbcController controllerUnderTest;      /* tests */ } 

Is there any way to get @InjectMocks to inject my String property? I know I can't mock a String since it's immutable, but can I just inject a normal String here?

@InjectMocks injects a null by default in this case. @Mock understandably throws an exception if I put it on myProperty. Is there another annotation I've missed that just means "inject this exact object rather than a Mock of it"?

Answer 1

You can't do this with Mockito, but Apache Commons actually has a way to do this using one of its built in utilities. You can put this in a function in JUnit that is run after Mockito injects the rest of the mocks but before your test cases run, like this:

@InjectMocks MyClass myClass;  @Before public void before() throws Exception {     FieldUtils.writeField(myClass, "fieldName", fieldValue, true); }