Using Mockito with TestNG

Question

I took a working test written for JUnit using Mockito and tried to adapt it to work with TestNG but oddly using TestNG only one test will work.

I think it is somehow rel

Answer 1

There is a difference in the behaviour of these frameworks:

• JUnit creates a new instance of class for every of its test methods. This means that the fields are not shared between tests.
• But TestNG creates only one object and thus the state in fields is shared between to @Tests

For Mockito you need to init mocks before every test method so that the state is not shared between two @Tests in TestNG:

@BeforeMethod
public void init() {
    MockitoAnnotations.initMocks(this);
}

For JUnit it works out of box because 2nd @Test has its own fields and its own mocks.