core/src/test/java/flex/messaging/util/HexTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 flex.messaging.util;

import org.junit.*;

public class HexTest {
    /**
     * Try encoding and decoding 10,000 random combinations of bytes.
     */
    @Test
    public void testEncodingAndDecoding() {
        int randomLimit = 500;
        boolean success = true;

        for (int myCount = 0; myCount < 10000; myCount++) {
            byte raw[] = new byte[(int) (Math.random() * randomLimit)];

            for (int i = 0; i < raw.length; ++i) {
                if ((i % 1024) < 256) {
                    raw[i] = (byte) (i % 1024);
                } else {
                    raw[i] = (byte) ((int) (Math.random() * 255) - 128);
                }
            }
            Hex.Encoder encoder = new Hex.Encoder(100);
            encoder.encode(raw);

            String encoded = encoder.drain();

            Hex.Decoder decoder = new Hex.Decoder();
            decoder.decode(encoded);
            byte check[] = decoder.flush();

            if (check.length != raw.length) {
                success = false;
            } else {
                for (int i = 0; i < check.length; ++i) {
                    if (check[i] != raw[i]) {
                        success = false;
                        break;
                    }
                }
            }

            if (!success) {
                break;
            }
        }

        org.junit.Assert.assertTrue(success);
    }
}