// Prepare test data
        byte[] buffer = new byte[50];
        byte[] originalGuid = new byte[16];
        for (int i = 0; i < 16; i++) {
            originalGuid[i] = (byte) i;
        }
        System.arraycopy(originalGuid, 0, buffer, 4, 16);

        // Decode
        response.decode(buffer, 0, 24);

        // Get the server GUID

            when(decodeBuffer.dec_ndr_small()).thenReturn((int) originalSid.revision, (int) originalSid.sub_authority_count,
                    (int) originalSid.identifier_authority[0], (int) originalSid.identifier_authority[1],
                    (int) originalSid.identifier_authority[2], (int) originalSid.identifier_authority[3],

        TestResponseProcessor processor1 = new TestResponseProcessor();
        testRule.setRuleId("originalId");
        testRule.setResponseProcessor(processor1);

        // Register
        testRule.register(0);

        // Verify initial state
        Rule registeredRule = ruleManager.getRules().get(0);
        assertEquals("originalId", registeredRule.getRuleId());
        assertSame(processor1, registeredRule.getResponseProcessor());