“Invalid use of argument matchers” but I use matchers only - unit-testing

Question

I wish to test the following getRights method:
public GetProductRp getRights(String aaId, String bbId, String ccId) {
GetProductRp rp = (GetProductRp) webServiceTemplate.marshalSendAndReceive(createRq(aaId, bbId, ccId));
return rp;
}
private GetProductRq createRq(String aaId, String bbId, String ccId) {
GetProductRq rq = new GetProductRq();
GetProductRqBody body = new GetProductRqBody();
body.setaaId(aaId);
body.setbbId(bbId);
body.setccId(ccId);
rq.setBody(body);
return rq;
}
This is my test class:
#RunWith(SpringRunner.class)
#SpringBootTest()
public class ClassTest {
#Autowired
private Class rightClass;
#MockBean
private WebServiceTemplate webServiceTemplate;
#Test
public void getRightsTest() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
GetProductRp response = Helper.createProductRp("xx", "yy");
Method mCreateRq = rightClass.class.getDeclaredMethod("createRq", String.class, String.class, String.class);
mCreateRq.setAccessible(true);
GetProductRq request = (GetProductRq) mCreateRq.invoke(rightClass, "12345678", "12345678", "1111");
Mockito.when(webServiceTemplate.marshalSendAndReceive(request)).thenReturn(response);
Mockito.when(rightClass.getRights(Mockito.anyString(), Mockito.anyString(), Mockito.anyString())).thenReturn(response);
Assert.assertNotNull(response);
}
I receive the error provided in the short description above altough I only use Matchers (Mockito.anyString())....
Any idea?

Answer 1

The issue here could be that you are putting #Autowired on private Class rightClass; and you are trying to mock the method of it. If you want to mock the method then you should put #MockBean annotation as :
#MockBean
private Class rightClass;