[FIXED] How to mock the following method via Mockito in junit testing

Issue

In my service class i have this

CacheLookupPolling_Darwin CacheLookupPolling_Darwin_FRAGMENT = beanFactory.getBean(CacheLookupPolling_Darwin.class);
String s = CacheLookupPolling_Darwin_FRAGMENT.cacheLookupPolling_Darwin(String, httpHeaders);

the class CacheLookupPolling_Darwin defines a DefaultHttpServletRequest like this

private DefaultHttpServletRequest Request;

In this class the function cacheLookupPolling_Darwin performs the following initialization:

Request = (DefaultHttpServletRequest) ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();

how can i mock this Request behaviour in my test class, the .getRequest() throws a nullPointerException.

Any advice?

Solution

You can inject the CacheLookupPolling_Darwin bean in your test class using @MockBean and then mock it's behavior with Mockito.

For example:

@ExtendWith(SpringExtension.class)
@SpringBootTest
public class SomeTestSuite {


    @MockBean
    private CacheLookupPolling_Darwin cacheLookupPolling_Darwin;

    @Test
    public void someTest() {
        given(cacheLookupPolling_Darwin.cacheLookupPolling_Darwin(ArgumentMatchers.anyString(), ArgumentMatchers.any()))
                .willReturn("mocked return value"));
    }

}

Answered By - flaviuratiu
Answer Checked By - Clifford M. (JavaFixing Volunteer)