Android example source code file (GsmAlphabetTest.java)

This example Android source code file (GsmAlphabetTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, encodeexception, exception, gsmalphabettest, largetest, mail, smalltest, smsheader, string, stringbuilder, test, testcase, voice

The GsmAlphabetTest.java Android example source code

/*
 * Copyright (C) 2006 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.internal.telephony;

import junit.framework.TestCase;

import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.SmallTest;
import android.test.suitebuilder.annotation.Suppress;

public class GsmAlphabetTest extends TestCase {

    private static final String sGsmExtendedChars = "{|}\\[~]\f\u20ac";

    @SmallTest
    public void test7bitWithHeader() throws Exception {
        SmsHeader.ConcatRef concatRef = new SmsHeader.ConcatRef();
        concatRef.refNumber = 1;
        concatRef.seqNumber = 2;
        concatRef.msgCount = 2;
        concatRef.isEightBits = true;
        SmsHeader header = new SmsHeader();
        header.concatRef = concatRef;

        String message = "aaaaaaaaaabbbbbbbbbbcccccccccc";
        byte[] userData = GsmAlphabet.stringToGsm7BitPackedWithHeader(message,
                SmsHeader.toByteArray(header));
        int septetCount = GsmAlphabet.countGsmSeptets(message, false);
        String parsedMessage = GsmAlphabet.gsm7BitPackedToString(
                userData, SmsHeader.toByteArray(header).length+2, septetCount, 1);
        assertEquals(message, parsedMessage);
    }

    // TODO: This method should *really* be a series of individual test methods.
    @LargeTest
    public void testBasic() throws Exception {
        // '@' maps to char 0
        assertEquals(0, GsmAlphabet.charToGsm('@'));

        // `a (a with grave accent) maps to last GSM charater
        assertEquals(0x7f, GsmAlphabet.charToGsm('\u00e0'));

        //
        // These are the extended chars
        // They should all return GsmAlphabet.GSM_EXTENDED_ESCAPE
        //

        for (int i = 0, s = sGsmExtendedChars.length(); i < s; i++) {
            assertEquals(GsmAlphabet.GSM_EXTENDED_ESCAPE,
                    GsmAlphabet.charToGsm(sGsmExtendedChars.charAt(i)));

        }

        // euro symbol
        assertEquals(GsmAlphabet.GSM_EXTENDED_ESCAPE,
                GsmAlphabet.charToGsm('\u20ac'));

        // An unmappable char (the 'cent' char) maps to a space
        assertEquals(GsmAlphabet.charToGsm(' '),
                GsmAlphabet.charToGsm('\u00a2'));

        // unmappable = space = 1 septet
        assertEquals(1, GsmAlphabet.countGsmSeptets('\u00a2'));

        //
        // Test extended table
        //

        for (int i = 0, s = sGsmExtendedChars.length(); i < s; i++) {
            assertEquals(sGsmExtendedChars.charAt(i),
                    GsmAlphabet.gsmExtendedToChar(
                            GsmAlphabet.charToGsmExtended(sGsmExtendedChars.charAt(i))));

        }

        // Unmappable extended char
        assertEquals(GsmAlphabet.charToGsm(' '),
                GsmAlphabet.charToGsmExtended('@'));

        //
        // gsmToChar()
        //

        assertEquals('@', GsmAlphabet.gsmToChar(0));

        // `a (a with grave accent) maps to last GSM charater
        assertEquals('\u00e0', GsmAlphabet.gsmToChar(0x7f));

        assertEquals('\uffff',
                GsmAlphabet.gsmToChar(GsmAlphabet.GSM_EXTENDED_ESCAPE));

        // Out-of-range/unmappable value
        assertEquals(' ', GsmAlphabet.gsmToChar(0x80));

        //
        // gsmExtendedToChar()
        //

        assertEquals('{', GsmAlphabet.gsmExtendedToChar(0x28));

        // No double-escapes
        assertEquals(' ', GsmAlphabet.gsmExtendedToChar(
                GsmAlphabet.GSM_EXTENDED_ESCAPE));

        // Unmappable
        assertEquals(' ', GsmAlphabet.gsmExtendedToChar(0));

        //
        // stringTo7BitPacked, gsm7BitPackedToString
        //

        byte[] packed;
        StringBuilder testString = new StringBuilder(300);

        // Check all alignment cases
        for (int i = 0; i < 9; i++, testString.append('@')) {
            packed = GsmAlphabet.stringToGsm7BitPacked(testString.toString());
            assertEquals(testString.toString(),
                    GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0]));
        }

        // Check full non-extended alphabet
        for (int i = 0; i < 0x80; i++) {
            char c;

            if (i == GsmAlphabet.GSM_EXTENDED_ESCAPE) {
                continue;
            }

            c = GsmAlphabet.gsmToChar(i);
            testString.append(c);

            // These are all non-extended chars, so it should be
            // one septet per char
            assertEquals(1, GsmAlphabet.countGsmSeptets(c));
        }

        packed = GsmAlphabet.stringToGsm7BitPacked(testString.toString());
        assertEquals(testString.toString(),
                GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0]));

        // Test extended chars too

        testString.append(sGsmExtendedChars);

        for (int i = 0, s = sGsmExtendedChars.length(); i < s; i++) {
            // These are all extended chars, so it should be
            // two septets per char
            assertEquals(2, GsmAlphabet.countGsmSeptets(sGsmExtendedChars.charAt(i)));

        }

        packed = GsmAlphabet.stringToGsm7BitPacked(testString.toString());
        assertEquals(testString.toString(),
                GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0]));

        // stringTo7BitPacked handles up to 255 septets

        testString.setLength(0);
        for (int i = 0; i < 255; i++) {
            testString.append('@');
        }

        packed = GsmAlphabet.stringToGsm7BitPacked(testString.toString());
        assertEquals(testString.toString(),
                GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0]));

        // > 255 septets throws runtime exception
        testString.append('@');

        try {
            GsmAlphabet.stringToGsm7BitPacked(testString.toString());
            fail("expected exception");
        } catch (EncodeException ex) {
            // exception expected
        }

        // Try 254 septets with 127 extended chars

        testString.setLength(0);
        for (int i = 0; i < (255 / 2); i++) {
            testString.append('{');
        }

        packed = GsmAlphabet.stringToGsm7BitPacked(testString.toString());
        assertEquals(testString.toString(),
                GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0]));

        // > 255 septets throws runtime exception
        testString.append('{');

        try {
            GsmAlphabet.stringToGsm7BitPacked(testString.toString());
            fail("expected exception");
        } catch (EncodeException ex) {
            // exception expected
        }

        //
        // 8 bit unpacked format
        //
        // Note: we compare hex strings here
        // because Assert doesnt have array-comparisons

        byte unpacked[];

        unpacked = IccUtils.hexStringToBytes("566F696365204D61696C");
        assertEquals("Voice Mail",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        assertEquals(IccUtils.bytesToHexString(unpacked),
                IccUtils.bytesToHexString(
                        GsmAlphabet.stringToGsm8BitPacked("Voice Mail")));

        unpacked = GsmAlphabet.stringToGsm8BitPacked(sGsmExtendedChars);
        // two bytes for every extended char
        assertEquals(2 * sGsmExtendedChars.length(), unpacked.length);
        assertEquals(sGsmExtendedChars,
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        // should be two bytes per extended char
        assertEquals(2 * sGsmExtendedChars.length(), unpacked.length);

        // Test truncation of unaligned extended chars
        unpacked = new byte[3];
        GsmAlphabet.stringToGsm8BitUnpackedField(sGsmExtendedChars, unpacked,
                0, unpacked.length);

        // Should be one extended char and an 0xff at the end

        assertEquals(0xff, 0xff & unpacked[2]);
        assertEquals(sGsmExtendedChars.substring(0, 1),
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        // Test truncation of normal chars
        unpacked = new byte[3];
        GsmAlphabet.stringToGsm8BitUnpackedField("abcd", unpacked,
                0, unpacked.length);

        assertEquals("abc",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        // Test truncation of mixed normal and extended chars
        unpacked = new byte[3];
        GsmAlphabet.stringToGsm8BitUnpackedField("a{cd", unpacked,
                0, unpacked.length);

        assertEquals("a{",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        // Test padding after normal char
        unpacked = new byte[3];
        GsmAlphabet.stringToGsm8BitUnpackedField("a", unpacked,
                0, unpacked.length);

        assertEquals("a",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        assertEquals(0xff, 0xff & unpacked[1]);
        assertEquals(0xff, 0xff & unpacked[2]);

        // Test malformed input -- escape char followed by end of field
        unpacked[0] = 0;
        unpacked[1] = 0;
        unpacked[2] = GsmAlphabet.GSM_EXTENDED_ESCAPE;

        assertEquals("@@",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 0, unpacked.length));

        // non-zero offset
        assertEquals("@",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 1, unpacked.length - 1));

        // test non-zero offset
        unpacked[0] = 0;
        GsmAlphabet.stringToGsm8BitUnpackedField("abcd", unpacked,
                1, unpacked.length - 1);


        assertEquals(0, unpacked[0]);

        assertEquals("ab",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 1, unpacked.length - 1));

        // test non-zero offset with truncated extended char
        unpacked[0] = 0;

        GsmAlphabet.stringToGsm8BitUnpackedField("a{", unpacked,
                1, unpacked.length - 1);

        assertEquals(0, unpacked[0]);

        assertEquals("a",
                GsmAlphabet.gsm8BitUnpackedToString(unpacked, 1, unpacked.length - 1));
    }
}