[FIXED] How do I test this static member in a class with private constructor?

Issue

So my class is:

public final class MyClass {

    private static MyObject myObject;

    public static void setMyObject(MyObject myObject) {
        MyClass.myObject = myObject;
    }

    private MyClass(MyObject myObject){
        setMyObject(myObject);
    }

    public static Optional<Object2> getObject2(params) {
        Optional<Object2> object2 =  myObject.execute(params);
        return object2;
    }

I'm trying to test with Junit

@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {

    @Mock
    private MyObject myObject;

    private MyClass myClass;

    @Before
    public void initialize() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void test1() {
        Mockito.doReturn(Optional.empty()).when(myObject).executeQueryWithArgument(any);
        myclass = new Myclass(myObject);

    }
}

        myclass = new Myclass(myObject);

This line fails and says make MyClass constructor package private. Is there any way to do this without doing that?

Solution

Add mocked myObject to the MyClass using the set method and write the test, like this:

@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {

    @Mock
    private MyObject myObject;

    private MyClass myClass;

    @Before
    public void setUp() {
        MyClass.setMyObject(myObject);
    }

    @Test
    public void shouldDoSomething() {
        // Arrange
        Mockito.doReturn(Optional.empty()).when(myObject).executeQueryWithArgument(any);

       // Act
        Optional<Object2> actual = myClass.getObject2(.....);

       // Assert
       .....
    }
}

Answered By - heaprc