lsarpc.LsarSidPtr sidPtr = new lsarpc.LsarSidPtr();

        when(mockNdrBuffer.dec_ndr_long()).thenReturn(0); // _sidp (null)

        sidPtr.decode(mockNdrBuffer);

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

    // Test for LsarSidArray
    @Test
    void testLsarSidArrayEncode() throws NdrException {