+/*
+ * Copyright 2008 ZXing authors
+ *
+ * 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.google.zxing.common.reedsolomon;
+
+import junit.framework.TestCase;
+
+import java.util.BitSet;
+import java.util.Random;
+
+/**
+ * @author srowen@google.com (Sean Owen)
+ */
+abstract class AbstractReedSolomonTestCase extends TestCase {
+
+ static void corrupt(int[] received, int howMany, Random random) {
+ BitSet corrupted = new BitSet(received.length);
+ for (int j = 0; j < howMany; j++) {
+ int location = random.nextInt(received.length);
+ if (corrupted.get(location)) {
+ j--;
+ } else {
+ corrupted.set(location);
+ received[location] = (received[location] + 1 + random.nextInt(255)) & 0xFF;
+ }
+ }
+ }
+
+}
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