[FIXED] spring mockito: when an object containing a list is an argument

Issue

The issue is that the list of ids within the pageRequest object can be in any order. Is there a way to specify that below? The test fails since the pageRequest has a list of ids in a different order than the one specified below. The "when" clause returns null in that case.

PageRequest pageRequest = PageRequest.builder()
                .ids(List.of(serviceId2, serviceId1, serviceId3))
                .build();
 when(client.getServices(eq(pageRequest))).thenAnswer(a -> {.......

Solution

You can implement a custom ArgumentMatcher to define the matching logic and then use argThat with this ArgumentMatcher during stubbing :

@Test
public void test(){
        when(someMock.getSerivce(argThat(pageRequestContainId(List.of(1,4,5,6))))).thenReturn(blablabla);
}

private ArgumentMatcher<PageRequest> pageRequestContainId(List<Integer> ids) {
        return pageReq -> pageReq.ids.containsAll(ids) && pageReq.ids.size() == ids.size();
}

Answered By - Ken Chan
Answer Checked By - Mary Flores (JavaFixing Volunteer)