MAP Client BMessage parser length

        String remng = mParser.remaining();

        byte[] data = remng.getBytes();

        if (offset < 0 || offset > data.length) {

            /* Handle possible exception for incorrect LENGTH value

             * from MSE while parsing end of props */

            throw new ParseException("Invalid LENGTH value", mParser.pos());

        }

        /* restart parsing from after 'message'<CRLF> */

        mParser = new BmsgTokenizer(new String(data, offset, data.length - offset), restartPos);

/*

 * Copyright (C) 2019 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.bluetooth.mapclient;

import static org.mockito.Mockito.*;

import androidx.test.filters.MediumTest;

import androidx.test.runner.AndroidJUnit4;

import org.junit.Assert;

import org.junit.Test;

import org.junit.runner.RunWith;

@MediumTest

@RunWith(AndroidJUnit4.class)

public class BmessageTest {

    private static final String TAG = BmessageTest.class.getSimpleName();

    private static final String SIMPLE_MMS_MESSAGE =

            "BEGIN:BMSG\r\nVERSION:1.0\r\nSTATUS:READ\r\nTYPE:MMS\r\nFOLDER:null\r\nBEGIN:BENV\r\n"

            + "BEGIN:VCARD\r\nVERSION:2.1\r\nN:null;;;;\r\nTEL:555-5555\r\nEND:VCARD\r\n"

            + "BEGIN:BBODY\r\nLENGTH:39\r\nBEGIN:MSG\r\nThis is a new msg\r\nEND:MSG\r\n"

            + "END:BBODY\r\nEND:BENV\r\nEND:BMSG\r\n";

    private static final String NO_END_MESSAGE =

            "BEGIN:BMSG\r\nVERSION:1.0\r\nSTATUS:READ\r\nTYPE:MMS\r\nFOLDER:null\r\nBEGIN:BENV\r\n"

            + "BEGIN:VCARD\r\nVERSION:2.1\r\nN:null;;;;\r\nTEL:555-5555\r\nEND:VCARD\r\n"

            + "BEGIN:BBODY\r\nLENGTH:39\r\nBEGIN:MSG\r\nThis is a new msg\r\n";

    private static final String WRONG_LENGTH_MESSAGE =

            "BEGIN:BMSG\r\nVERSION:1.0\r\nSTATUS:READ\r\nTYPE:MMS\r\nFOLDER:null\r\nBEGIN:BENV\r\n"

            + "BEGIN:VCARD\r\nVERSION:2.1\r\nN:null;;;;\r\nTEL:555-5555\r\nEND:VCARD\r\n"

            + "BEGIN:BBODY\r\nLENGTH:200\r\nBEGIN:MSG\r\nThis is a new msg\r\nEND:MSG\r\n"

            + "END:BBODY\r\nEND:BENV\r\nEND:BMSG\r\n";

    private static final String NO_BODY_MESSAGE =

            "BEGIN:BMSG\r\nVERSION:1.0\r\nSTATUS:READ\r\nTYPE:MMS\r\nFOLDER:null\r\nBEGIN:BENV\r\n"

            + "BEGIN:VCARD\r\nVERSION:2.1\r\nN:null;;;;\r\nTEL:555-5555\r\nEND:VCARD\r\n"

            + "BEGIN:BBODY\r\nLENGTH:\r\n";

    private static final String NEGATIVE_LENGTH_MESSAGE =

            "BEGIN:BMSG\r\nVERSION:1.0\r\nSTATUS:READ\r\nTYPE:MMS\r\nFOLDER:null\r\nBEGIN:BENV\r\n"

            + "BEGIN:VCARD\r\nVERSION:2.1\r\nN:null;;;;\r\nTEL:555-5555\r\nEND:VCARD\r\n"

            + "BEGIN:BBODY\r\nLENGTH:-1\r\nBEGIN:MSG\r\nThis is a new msg\r\nEND:MSG\r\n"

            + "END:BBODY\r\nEND:BENV\r\nEND:BMSG\r\n";

    @Test

    public void testNormalMessages() {

        Bmessage message = BmessageParser.createBmessage(SIMPLE_MMS_MESSAGE);

        Assert.assertNotNull(message);

    }

    @Test

    public void testParseWrongLengthMessage() {

        Bmessage message = BmessageParser.createBmessage(WRONG_LENGTH_MESSAGE);

        Assert.assertNull(message);

    }

    @Test

    public void testParseNoEndMessage() {

        Bmessage message = BmessageParser.createBmessage(NO_END_MESSAGE);

        Assert.assertNull(message);

    }

    @Test

    public void testParseReallyLongMessage() {

        String testMessage = new String(new char[68048]).replace('\0', 'A');

        Bmessage message = BmessageParser.createBmessage(testMessage);

        Assert.assertNull(message);

    }

    @Test

    public void testNoBodyMessage() {

        Bmessage message = BmessageParser.createBmessage(NO_BODY_MESSAGE);

        Assert.assertNull(message);

    }

    @Test

    public void testNegativeLengthMessage() {

        Bmessage message = BmessageParser.createBmessage(NEGATIVE_LENGTH_MESSAGE);

        Assert.assertNull(message);

    }

}