end = srcIndex + rDataLength;
        /* Apparently readRDataWireFormat can return 0 if resultCode != 0 in
        which case this will look indefinitely. Putting this else clause around
        the loop might fix that. But I would need to see a capture to confirm.
        if (resultCode != 0) {
            srcIndex += rDataLength;
        } else {
        */

    }

    @Test
    void readRDataWireFormat_shouldReturnZero_whenResultCodeIsNotZero() throws NoSuchFieldException, IllegalAccessException {
        // Set 'resultCode' field in superclass to a non-zero value
        Field resultCodeField = NameServicePacket.class.getDeclaredField("resultCode");
        resultCodeField.setAccessible(true);
        resultCodeField.set(nameQueryResponse, 1); // Simulate an error result code

        end = srcIndex + this.rDataLength;
        /*
         * Apparently readRDataWireFormat can return 0 if resultCode != 0 in
         * which case this will look indefinitely. Putting this else clause around
         * the loop might fix that. But I would need to see a capture to confirm.
         * if (resultCode != 0) {
         * srcIndex += rDataLength;
         * } else {
         */

        assertEquals(expectedString, packet.toString());

        // Test other opCode, resultCode, questionType, recordType branches

    }

    @Override
    int writeRDataWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override
    int readRDataWireFormat(final byte[] src, int srcIndex) {
        if (resultCode != 0 || opCode != QUERY) {
            return 0;
        }
        final boolean groupName = ((src[srcIndex] & 0x80) == 0x80) == true;
        final int nodeType = (src[srcIndex] & 0x60) >> 5;
        srcIndex += 2;

                    ioe.printStackTrace(log);
                }
                throw new UnknownHostException(name.name);
            }

            if (response.received && response.resultCode == 0) {
                return response.addrEntry;
            }
        } while (--n > 0 && request.isBroadcast);

        throw new UnknownHostException(name.name);
    }

    }

    @Override
    int writeRDataWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override
    int readRDataWireFormat(final byte[] src, int srcIndex) {
        if (this.resultCode != 0 || this.opCode != QUERY) {
            return 0;
        }
        final boolean groupName = ((src[srcIndex] & 0x80) == 0x80) == true;
        final int nodeType = (src[srcIndex] & 0x60) >> 5;
        srcIndex += 2;

        Model resultModel = resultData.getModel();

        problems.setSource(resultModel);
        problems.setRootModel(resultModel);

        // model interpolation
        resultModel = interpolateModel(resultModel, request, problems);
        resultData.setModel(resultModel);

        if (resultModel.getParent() != null) {