Testing a method calling a method in the same class which calls a method of service class

Question

I'm pretty new to Junit and I'm trying to test isApproved method in Junit. I'm am mocking isDateValidOfData method using when and thenReturn using Mockito.when(isDateValidOfData(anyLong(), anyString()).thenReturn(true); This is getting an indexOutOfBounds exception. Here the serviceClass is being called on argument matchers so returning nothing in the list of data. I just want to know is there a way to mock the data and test it using Mockito and Junit. Using spy to get the object of the same class to call the method.

MyClass {
        //Service class calls the repository to fetch data. 
        @Autowired
        ServiceClass serviceClass; 

        public boolean isApproved(Long id, String code) {
                // Validation is done on the arguments
                //if id is of a particular type then return true by default
                //if code is in a list already present then continue with the below code or else return true by default. 
                return isDateValidOfData(Long id, String code);
        }

        public boolean isDateValidOfData(Long id, String code) {

                List<Data> data = serviceObject.getData(id, code);
                LocalDateTime eDate = data.get(0).getEDate();
                LocalDateTime rDate = data.get(0).getRDate();
                // check if eDate and rDate is greater than current date, if yes         return true or return false
        }
}

@RunWith(SpringRunner.class)
TestClass {
        @InjectMocks
        MyClass myClass;

        @Test
        public void isApprovedTest() {
                MyClass myClass1 = Mockito.spy(myClass);
                Mockito.when(myClass1.isDateValidOfData(anyLong(), anyString())).thenReturn(true);
                Assert.assertTrue(myClass1.isApproved(1234L, "1234");
        }       
}

@Pi53 Please [edit] your question to include the full source code you have. It is not know what `serviceObject()` is or how `isApproved()` is implemented. See [mcve]. Also include the full error message you get. — Progman, Apr 05 '20 at 11:54
@Progman, I've tried to be descriptive in the comments. Hope that clarifies all the doubts. Nothing else code wise that relates to the problem. — Pi53, Apr 05 '20 at 12:02
@Progman, yes it does. Thanks a lot. Not sure why I hadn't tried it before. — Pi53, Apr 05 '20 at 13:09

Lemmy · Answer 1 · 2020-04-05T13:12:53.020

2

Since you are using @InjectMocks you should use @RunWith(MockitoJUnitRunner.class) on class level an everything will work fine.

If you want to use @RunWith(SpringRunner.class) then use @MockBean and @SpyBean to write test.

EDIT:

You can see more @RunWith(SpringRunner.class) vs @RunWith(MockitoJUnitRunner.class) here

Additional, you can check this Why we use Mockitojunitrunner class in our junit test?

and @RunWith(SpringRunner.class) with Spring Boot

Also, please check this one Mockito - difference between doReturn() and when()

edited Apr 05 '20 at 13:12

answered Apr 05 '20 at 12:15

Lemmy

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it didn't solve my problem. Have changed it to use SpyBean annotation instead of InjectMocks but still getting indexoutofbounds exception. – Pi53 Apr 05 '20 at 12:54
can you update your question with the new code? Or add here the new code – Lemmy Apr 05 '20 at 12:59
1

Progman's comment has answered my question. The thread proved to be very helpful. Using doReturn instead of when thenReturn. – Pi53 Apr 05 '20 at 13:10

Testing a method calling a method in the same class which calls a method of service class

1 Answers1