如何为在枚举中声明的 guice 注入 static 变量编写 junit

Question

I have enum like this

public enum NumbersJk {

    ONE {
        public void processCommand(Info Info) {
            log.info("what is in process " + process)
            process.add(Info);
        }
    },
    TWO {
        public void processCommand(Info Info) {
            process.subtract(Info);
        }
    },
    TEN {
        public void processCommand(Info Info) {
            process.divide(Info);
        }
    }

    @Inject
    private static ProcessNumber process;

    public abstract void processCommand(Info Info) throws Exception;
}

It was injected using guice like this requestStaticInjection(NumbersJk.class);

public class AddNumbers {
   public string testMethod(bla,bla,commandToExecute){
      Info info = convert(bla,bla)
      NumbersJk.valueOf(commandToExecute).processCommand(Info);
   }
}

Now I am trying to write junit (powermockito) for this

Junit

@Mock
private ProcessNumber process = new ProcessNumber(new depsencey(), dependecny2());

@InjectMocks
AddNumber addNumber;

@Before
public void setUp() throws Exception {

    MockitoAnnotations.initMocks(this);
}


@Test
@SneakyThrows
public void test() { 
    addNumber.testMethod(1,2,ONE) 
}

This internally calls

NumbersJk.valueOf(commandToExecute).processCommand(Info);

And getting exception java.lang.NullPointerException: null

This is ProcessNumber is coming as null

log.info("what is in process " + process) printed as `what is in process null`

Question:

How to inject the class ProcessNumber in junit

Thanks Jk

Answer 1

I figured it out. We can use powermock to solve this problem Whitebox.setInternalState(NumbersJk.class, process);

Code:

@Mock
private ProcessNumber process = new ProcessNumber(new depsencey(), dependecny2());

@InjectMocks
AddNumber addNumber;

@Before
public void setUp() throws Exception {
    Whitebox.setInternalState(NumbersJk.class, process);
    MockitoAnnotations.initMocks(this);
}


@Test
@SneakyThrows
public void test() { 
    addNumber.testMethod(1,2,ONE) 
}