java - 如何在具有私有(private)构造函数的类中测试此静态成员？

Question

所以我的类(class)是:

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;
    }

我正在尝试使用 Junit 进行测试

@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);

此行失败并表示将 MyClass 构造函数包设为私有(private)。有什么方法可以做到这一点而不这样做吗？

Answer 1

使用 set 方法将模拟的 myObject 添加到 MyClass 并编写测试，如下所示:

@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
       .....
    }
}