/*
* 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 org.apache.harmony.pack200.tests;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import junit.framework.TestCase;
import org.apache.harmony.pack200.Codec;
import org.apache.harmony.pack200.Pack200Exception;
import org.apache.harmony.pack200.PopulationCodec;
public class PopulationCodecTest extends TestCase {
public void testPopulationCodec() throws IOException, Pack200Exception {
checkDecode(new byte[] { 4, 5, 6, 4, 2, 1, 3, 0, 7 }, new long[] { 5,
4, 6, 7 }, Codec.BYTE1);
// Codec.SIGNED5 can be trivial for small n, because the encoding is 2n
// if even, 2n-1 if odd
// Therefore they're left here to explain what the values are :-)
checkDecode(new byte[] { 4 * 2, 4 * 2 - 1, 6 * 2, 4 * 2, 2 * 2, 1 * 2,
3 * 2, 0, 7 * 2 }, new long[] { -4, 4, 6, 7 }, Codec.SIGNED5);
checkDecode(new byte[] { 4 * 2 - 1, 4 * 2, 6 * 2, 4 * 2, 2 * 2, 1 * 2,
3 * 2, 0, 7 * 2 }, new long[] { 4, -4, 6, 7 }, Codec.SIGNED5);
checkDecode(new byte[] { 1, 1, 1 }, new long[] { 1 }, Codec.BYTE1);
checkDecode(new byte[] { 2, 2, 1 }, new long[] { 2 }, Codec.BYTE1);
checkDecode(new byte[] { 1, 1, 2 }, new long[] { -1 }, Codec.SIGNED5);
checkDecode(new byte[] { 2, 2, 0, 1, 3 }, new long[] { 3, 2 },
Codec.BYTE1);
checkDecode(new byte[] { 1, 2, 3, 4, 4, 2, 3, 4, 0, 1 }, new long[] {
2, 3, 4, 1 }, Codec.BYTE1);
checkDecode(new byte[] { 3, 2, 1, 4, 4, 2, 3, 4, 0, 1 }, new long[] {
2, 1, 4, 1 }, Codec.BYTE1);
checkDecode(new byte[] { 3, 2, 1, 4, 1, 2, 3, 4, 0, 1 }, new long[] {
2, 1, 4, 1 }, Codec.BYTE1);
}
private void checkDecode(byte[] data, long[] expectedResult, Codec codec)
throws IOException, Pack200Exception {
InputStream in = new ByteArrayInputStream(data);
int[] result = new PopulationCodec(codec, codec, codec).decodeInts(
expectedResult.length, in);
assertEquals(expectedResult.length, result.length);
for (int i = 0; i < expectedResult.length; i++) {
assertEquals(expectedResult[i], result[i]);
}
assertEquals(0, in.available());
}
}