用引用类型参数调用的Java mockito-verify方法

Question

我刚开始使用Mockito，我正在验证某个方法应该用特定的参数调用，而所有的值类型参数(int、String、enum等）都可以验证，但引用/类类型参数似乎没有，下面是一个示例

// my actual class
public class MyActualClass {
   public void processRequest() {
       User curUser = MyUtils.getUserFromOtherPlace(UserType.ADMIN);
       processAnotherRequest(1, "address", curUser);
   }
   public void processAnotherRequest(int userId, String address, User user) { ... }
}
public static class MyUtils{
   public static getUserFromOtherPlace(UserType userType) {
       User newUser = new User();
       if (userType == UserType.ADMIN) {
          newUser.setAccess(1);
       }
       //...
       return newUser
   }
}

// my test class
public class MyActualClassTest{
   @Mock
   private MyActualClass myActualClass;

   @Test
   public void testIfMethodBeingCalledCorrectly() {
      User adminUser = new User();
      adminUser.setAccess(1);
      doCallRealMethod().when(myActualClass).processRequest();
      myActualClass.processRequest();
      verify(myActualClass).processAnotherRequest(1, "address", adminUser);
   }
}

// tried 1
when(MyUtils.getUserFromOtherPlace(UserType.ADMIN).thenReturn(adminUser);  // this throws error like "You cannot use argument matchers outside of verification or stubbing", and suggest using eq()
// tried 2
when(MyUtils.getUserFromOtherPlace(eq(UserType.ADMIN)).thenReturn(adminUser); //this throws NullPointer exception in getUserFromOtherPlace when check the input enum parameter "userType"

那么，我如何将引用对象传递到我的输入方法中，并在这里将其模拟为我的内部方法的返回值呢？顺便说一句，如果我的方法只包含值类型参数，它将工作...

Answer 1

因此，为了模拟您的静态方法，您需要：

@RunWith(PowerMockRunner.class)
@PrepareForTest({ MyUtils.class })

//your test class here

@Before
public void setup() {
    PowerMockito.mockStatic(MyUtils.class);
    when(MyUtils.getUserFromOtherPlace(UserType.ADMIN).thenReturn(adminUser);
}

但是如果有其他选择，我总是不喜欢模仿静态类，所以也许你可以尝试一个参数捕获器：

//test class

@Captor
private ArgumentCaptor<User> captor;

//your test
@Test
public void testIfMethodBeingCalledCorrectly() {
    doCallRealMethod().when(myActualClass).processRequest();
    myActualClass.processRequest();
    verify(myActualClass, times(1)).processAnotherRequest(1, "address", 
        captor.capture());
    Assert.assertEquals(1, captor.getValue().getAccess());
}