when(mockDeferredNdrBuffer.dec_ndr_long()).thenReturn(2); // _sidss

        sidArray.decode(mockNdrBuffer);

        assertEquals(2, sidArray.num_sids);
        assertNotNull(sidArray.sids);
        assertEquals(2, sidArray.sids.length);
        assertNotNull(sidArray.sids[0]);
        assertNotNull(sidArray.sids[1]);