Mockito NullPointerException

Question

I followed what @hoaz suggested. However, I am getting nullpointer exception

@RunWith(MockitoJUnitRunner.class)
public class GeneralConfigServiceImplTest  {
         


        

Answer 1

You haven't mocked the behavior of getId in externalDependencyObject therefore it is returning null and giving you the NPE when toString() is called on that null.

You need a when(externalDependencyObject.getId()).then...