Dropbox Paper

Mockito

References:

https://www.journaldev.com/21816/mockito-tutorial

https://www.tutorialspoint.com/mockito/index.htm

https://javacodehouse.com/blog/mockito-tutorial/

As I returned back to Java programming, I had to revise my concepts of Junit testing and Mockito. The following is a refresher with quick mockito basics for anyone who wishes to go through them.

* Keep in mind the current version is as and when I am learning mockito myself *

At a high level we divide mocking in the following broad steps

Initiation

Stubbing

Verification

Initialization

Reference:

https://stackoverflow.com/questions/15494926/initialising-mock-objects-mockito

Dao.class)

Setup Method Stubbing

Option 1:

Basic self-contained test mock initialization

//Creating a mock Object of the given class

<ClassName> mockObj = Mockito.mock(<ClassName>.class);

//example

OrderDao mockOrderDao = Mockito.mock(OrderDao.class);

Option 2:

Using @Mock annotation

@Mock

AddService addService;

@BeforeEach

public void setup() {

//initMocks works with @Mock, @Spy, @Captor, or @InjectMocks annotated objects

//InjectMock inserts mocks in either a Mocked component, or an autowired service or just an instance of a component

//Spy

//Captor

MockitoAnnotations.initMocks(this);

}

@Test

public void testCalc() {

calcService = new CalcService(addService);

int num1 = 11; int num2 = 12; int expected = 23;

when(addService.add(num1, num2)).thenReturn(expected);

int actual = calcService.calc(num1, num2);

assertEquals(expected, actual);

}

​​Initialization

Initialization