assertThrows(CIFSException.class, () -> sidResolver.getGroupMemberSids(mockContext, testServerName, null, 512, 0));
    }

    @Test
    void testGetGroupMemberSids_InvalidRid() throws CIFSException {
        when(sidResolver.getGroupMemberSids(any(CIFSContext.class), anyString(), any(SID.class), eq(-1), anyInt()))
                .thenThrow(new CIFSException("Invalid RID"));