BitwiseStreamsTest.java revision e564b19ed2f6b8b5667648254bc6c6859bb536e7 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.unit_tests;
18
19import com.android.internal.util.BitwiseInputStream;
20import com.android.internal.util.BitwiseOutputStream;
21import com.android.internal.util.HexDump;
22
23import android.test.AndroidTestCase;
24import android.test.suitebuilder.annotation.SmallTest;
25
26import android.util.Log;
27
28public class BitwiseStreamsTest extends AndroidTestCase {
29    private final static String LOG_TAG = "BitwiseStreamsTest";
30
31    @SmallTest
32    public void testOne() throws Exception {
33        int offset = 3;
34        byte[] inBuf = HexDump.hexStringToByteArray("FFDD");
35        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
36        outStream.skip(offset);
37        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
38        byte[] outBuf = outStream.toByteArray();
39        BitwiseInputStream inStream = new BitwiseInputStream(outBuf);
40        byte[] inBufDup = new byte[inBuf.length];
41        inStream.skip(offset);
42        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = inStream.read(8);
43        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
44    }
45
46    @SmallTest
47    public void testTwo() throws Exception {
48        int offset = 3;
49        byte[] inBuf = HexDump.hexStringToByteArray("11d4f29c0e9ad3c36e72584e064d9b53");
50        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
51        outStream.skip(offset);
52        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
53        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
54        inStream.skip(offset);
55        byte[] inBufDup = new byte[inBuf.length];
56        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = inStream.read(8);
57        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
58    }
59
60    @SmallTest
61    public void testThree() throws Exception {
62        int offset = 4;
63        byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
64        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
65        outStream.skip(offset);
66        for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
67        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
68        inStream.skip(offset);
69        byte[] inBufDup = new byte[inBuf.length];
70        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = inStream.read(8);
71        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
72    }
73
74    @SmallTest
75    public void testFour() throws Exception {
76        int offset = 7;
77        byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
78        BitwiseOutputStream outStream = new BitwiseOutputStream(30);
79        outStream.skip(offset);
80        for (int i = 0; i < inBuf.length; i++) {
81            outStream.write(5, inBuf[i] >>> 3);
82            outStream.write(3, inBuf[i] & 0x07);
83        }
84        BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
85        inStream.skip(offset);
86        byte[] inBufDup = new byte[inBuf.length];
87        for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = inStream.read(8);
88        assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
89    }
90
91    @SmallTest
92    public void testFive() throws Exception {
93        int num_runs = 10;
94        long start = android.os.SystemClock.elapsedRealtime();
95        for (int run = 0; run < num_runs; run++) {
96            int offset = run % 8;
97            byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
98            BitwiseOutputStream outStream = new BitwiseOutputStream(30);
99            outStream.skip(offset);
100            for (int i = 0; i < inBuf.length; i++) {
101                outStream.write(5, inBuf[i] >>> 3);
102                outStream.write(3, inBuf[i] & 0x07);
103            }
104            BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
105            inStream.skip(offset);
106            byte[] inBufDup = new byte[inBuf.length];
107            for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = inStream.read(8);
108            assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
109        }
110        long end = android.os.SystemClock.elapsedRealtime();
111        Log.d(LOG_TAG, "repeated encode-decode took " + (end - start) + " ms");
112    }
113}
114