assertEquals(SID.SID_TYPE_DOMAIN, domainSid.getType());
    }

    /**
     * Test getting the RID.
     *
     * @throws SmbException if the SID string is invalid
     */
    @Test
    void testGetRid() throws SmbException {
        // Create a mock RPC SID to simulate a user SID
        rpc.sid_t rpcSid = new rpc.sid_t();
        rpcSid.revision = 1;

        ace.access = 0x001200A9;
        assertEquals(0x001200A9, ace.getAccessMask());
    }

    @Test
    @DisplayName("Test getSID returns correct SID")
    void testGetSID() throws SmbException {
        assertNull(ace.getSID());

        SID testSid = new SID("S-1-5-21-1234567890-123456789-123456789-1000");
        ace.sid = testSid;

        assertSame(testSid, ace.getSID());

            testMessage.setExtendedSecurity(false);
            // Method is empty, just ensure no exception
        }

        @Test
        @DisplayName("Should ignore UID setting")
        void testSetUid() {
            testMessage.setUid(123);
            // Method is empty, just ensure no exception
        }
    }

    @Nested
    @DisplayName("Equals and HashCode Tests")