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Android example source code file (BitwiseStreamsTest.java)

This example Android source code file (BitwiseStreamsTest.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, androidtestcase, bitwiseinputstream, bitwiseoutputstream, bitwisestreamstest, exception, ffdd, log_tag, random, smalltest, string, test, util, utilities, utils

The BitwiseStreamsTest.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.util;

import com.android.internal.util.BitwiseInputStream;
import com.android.internal.util.BitwiseOutputStream;
import com.android.internal.util.HexDump;

import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;

import android.util.Log;

import java.util.Random;

public class BitwiseStreamsTest extends AndroidTestCase {
    private final static String LOG_TAG = "BitwiseStreamsTest";

    @SmallTest
    public void testOne() throws Exception {
        int offset = 3;
        byte[] inBuf = HexDump.hexStringToByteArray("FFDD");
        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
        outStream.skip(offset);
        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
        byte[] outBuf = outStream.toByteArray();
        BitwiseInputStream inStream = new BitwiseInputStream(outBuf);
        byte[] inBufDup = new byte[inBuf.length];
        inStream.skip(offset);
        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
    }

    @SmallTest
    public void testTwo() throws Exception {
        int offset = 3;
        byte[] inBuf = HexDump.hexStringToByteArray("11d4f29c0e9ad3c36e72584e064d9b53");
        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
        outStream.skip(offset);
        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
        inStream.skip(offset);
        byte[] inBufDup = new byte[inBuf.length];
        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
    }

    @SmallTest
    public void testThree() throws Exception {
        int offset = 4;
        byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
        outStream.skip(offset);
        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
        inStream.skip(offset);
        byte[] inBufDup = new byte[inBuf.length];
        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
    }

    @SmallTest
    public void testFour() throws Exception {
        int offset = 7;
        byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
        outStream.skip(offset);
        for (int i = 0; i < inBuf.length; i++) {
            outStream.write(5, inBuf[i] >>> 3);
            outStream.write(3, inBuf[i] & 0x07);
        }
        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
        inStream.skip(offset);
        byte[] inBufDup = new byte[inBuf.length];
        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
    }

    @SmallTest
    public void testFive() throws Exception {
        Random random = new Random();
        int iterations = 10000;
        int[] sizeArr = new int[iterations];
        int[] valueArr = new int[iterations];
        BitwiseOutputStream outStream = new BitwiseOutputStream(iterations * 4);
        for (int i = 0; i < iterations; i++) {
            int x = random.nextInt();
            int size = (x & 0x07) + 1;
            int value = x & (-1 >>> (32 - size));
            sizeArr[i] = size;
            valueArr[i] = value;
            outStream.write(size, value);
        }
        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
        for (int i = 0; i < iterations; i++) {
            assertEquals(valueArr[i], inStream.read(sizeArr[i]));
        }
    }

    @SmallTest
    public void testSix() throws Exception {
        int num_runs = 10;
        long start = android.os.SystemClock.elapsedRealtime();
        for (int run = 0; run < num_runs; run++) {
            int offset = run % 8;
            byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
            BitwiseOutputStream outStream = new BitwiseOutputStream(30);
            outStream.skip(offset);
            for (int i = 0; i < inBuf.length; i++) {
                outStream.write(5, inBuf[i] >>> 3);
                outStream.write(3, inBuf[i] & 0x07);
            }
            BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
            inStream.skip(offset);
            byte[] inBufDup = new byte[inBuf.length];
            for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
            assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
        }
        long end = android.os.SystemClock.elapsedRealtime();
        Log.d(LOG_TAG, "repeated encode-decode took " + (end - start) + " ms");
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android BitwiseStreamsTest.java source code file:

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