2 * Copyright 2008 ZXing authors
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package com.google.zxing.common.reedsolomon;
19 import org.junit.Test;
21 import java.util.Random;
26 public final class ReedSolomonEncoderQRCodeTestCase extends AbstractReedSolomonTestCase {
29 * Tests example given in ISO 18004, Annex I
32 public void testISO18004Example() {
34 0x10, 0x20, 0x0C, 0x56, 0x61, 0x80, 0xEC, 0x11,
35 0xEC, 0x11, 0xEC, 0x11, 0xEC, 0x11, 0xEC, 0x11 };
36 int[] expectedECBytes = {
37 0xA5, 0x24, 0xD4, 0xC1, 0xED, 0x36, 0xC7, 0x87,
39 doTestQRCodeEncoding(dataBytes, expectedECBytes);
43 public void testQRCodeVersusDecoder() throws Exception {
44 Random random = getRandom();
45 ReedSolomonEncoder encoder = new ReedSolomonEncoder(GF256.QR_CODE_FIELD);
46 ReedSolomonDecoder decoder = new ReedSolomonDecoder(GF256.QR_CODE_FIELD);
47 for (int i = 0; i < 100; i++) {
48 int size = random.nextInt(1000);
49 int[] toEncode = new int[size];
50 int ecBytes = 1 + random.nextInt(2 * (1 + size / 8));
51 int dataBytes = size - ecBytes;
52 for (int j = 0; j < dataBytes; j++) {
53 toEncode[j] = random.nextInt(256);
55 int[] original = new int[dataBytes];
56 System.arraycopy(toEncode, 0, original, 0, dataBytes);
57 encoder.encode(toEncode, ecBytes);
58 decoder.decode(toEncode, ecBytes);
59 assertArraysEqual(original, 0, toEncode, 0, dataBytes);
63 // Need more tests I am sure