assertNull(sidPtr.sid); // Not initialized when _sidp is 0
        // Note: NdrBuffer does not have decode method
    }

    // Test for LsarSidArray
    @Test
    void testLsarSidArrayEncode() throws NdrException {
        lsarpc.LsarSidArray sidArray = new lsarpc.LsarSidArray();
        sidArray.num_sids = 2;
        sidArray.sids = new lsarpc.LsarSidPtr[2];
        sidArray.sids[0] = mock(lsarpc.LsarSidPtr.class);