/*
* 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 junit.framework.TestCase;
import org.apache.harmony.pack200.BHSDCodec;
import org.apache.harmony.pack200.Codec;
import org.apache.harmony.pack200.Pack200Exception;
import org.apache.harmony.pack200.PopulationCodec;
import org.apache.harmony.pack200.RunCodec;
/**
* Test for RunCodec
*/
public class RunCodecTest extends TestCase {
public void testRunCodec() {
try {
new RunCodec(0, BHSDCodec.SIGNED5, BHSDCodec.UDELTA5);
fail("Should not allow a k value of 0");
} catch (Pack200Exception e) {
// pass
}
try {
new RunCodec(10, null, BHSDCodec.UDELTA5);
fail("Should not allow a null codec");
} catch (Pack200Exception e) {
// pass
}
try {
new RunCodec(10, BHSDCodec.UDELTA5, null);
fail("Should not allow a null codec");
} catch (Pack200Exception e) {
// pass
}
try {
new RunCodec(10, null, null);
fail("Should not allow a null codec");
} catch (Pack200Exception e) {
// pass
}
}
public void testDecode() throws Exception {
RunCodec runCodec = new RunCodec(1, Codec.UNSIGNED5, Codec.BYTE1);
ByteArrayInputStream bais = new ByteArrayInputStream(new byte[] {
(byte) 192, 0, (byte) 192, 0 });
assertEquals(192, runCodec.decode(bais));
assertEquals(192, runCodec.decode(bais));
assertEquals(0, runCodec.decode(bais));
assertEquals(0, bais.available());
runCodec = new RunCodec(1, Codec.BYTE1, Codec.UNSIGNED5);
bais = new ByteArrayInputStream(new byte[] { (byte) 192, 0, (byte) 192,
0 });
assertEquals(192, runCodec.decode(bais));
assertEquals(0, runCodec.decode(bais));
assertEquals(192, runCodec.decode(bais));
assertEquals(0, bais.available());
}
public void testDecodeInts() throws Exception {
int[] band = new int[] { 1, -2, -3, 1000, 55, 5, 10, 20 };
// first 5 of band to be encoded with DELTA5
byte[] bytes1 = Codec.DELTA5.encode(new int[] { 1, -2, -3, 1000, 55 });
// rest of band to be encoded with UNSIGNED5
byte[] bytes2 = Codec.UNSIGNED5.encode(new int[] { 5, 10, 20 });
byte[] bandEncoded = new byte[bytes1.length + bytes2.length];
System.arraycopy(bytes1, 0, bandEncoded, 0, bytes1.length);
System.arraycopy(bytes2, 0, bandEncoded, bytes1.length, bytes2.length);
RunCodec runCodec = new RunCodec(5, Codec.DELTA5, Codec.UNSIGNED5);
int[] bandDecoded = runCodec.decodeInts(8, new ByteArrayInputStream(
bandEncoded));
assertEquals(band.length, bandDecoded.length);
for (int i = 0; i < band.length; i++) {
assertEquals(band[i], bandDecoded[i]);
}
}
public void testNestedPopulationCodec() throws Exception {
int[] band = new int[] { 11, 12, 33, 4000, -555, 5, 10, 20, 10, 3, 20,
20, 20, 10, 10, 999, 20, 789, 10, 10, 355, 12345 };
// first 5 of band to be encoded with DELTA5
byte[] bytes1 = Codec.DELTA5
.encode(new int[] { 11, 12, 33, 4000, -555 });
// rest of band to be encoded with a PopulationCodec
PopulationCodec popCodec = new PopulationCodec(Codec.UNSIGNED5,
Codec.BYTE1, Codec.UNSIGNED5);
byte[] bytes2 = popCodec.encode(new int[] { 10, 20 }, new int[] { 0, 1,
2, 1, 0, 2, 2, 2, 1, 1, 0, 2, 0, 1, 1, 0, 0 }, new int[] { 5,
3, 999, 789, 355, 12345 });
byte[] bandEncoded = new byte[bytes1.length + bytes2.length];
System.arraycopy(bytes1, 0, bandEncoded, 0, bytes1.length);
System.arraycopy(bytes2, 0, bandEncoded, bytes1.length, bytes2.length);
RunCodec runCodec = new RunCodec(5, Codec.DELTA5, new PopulationCodec(
Codec.UNSIGNED5, Codec.BYTE1, Codec.UNSIGNED5));
int[] bandDecoded = runCodec.decodeInts(band.length,
new ByteArrayInputStream(bandEncoded));
assertEquals(band.length, bandDecoded.length);
for (int i = 0; i < band.length; i++) {
assertEquals(band[i], bandDecoded[i]);
}
}
public void testNestedRunCodec() throws Exception {
int[] band = new int[] { 1, 2, 3, 10, 20, 30, 100, 200, 300 };
// first 3 of band to be encoded with UDELTA5
byte[] bytes1 = Codec.UDELTA5.encode(new int[] { 1, 2, 3 });
// rest of band to be encoded with a RunCodec
byte[] bytes2 = Codec.BYTE1.encode(new int[] { 10, 20, 30 });
byte[] bytes3 = Codec.UNSIGNED5.encode(new int[] { 100, 200, 300 });
byte[] bandEncoded = new byte[bytes1.length + bytes2.length
+ bytes3.length];
System.arraycopy(bytes1, 0, bandEncoded, 0, bytes1.length);
System.arraycopy(bytes2, 0, bandEncoded, bytes1.length, bytes2.length);
System.arraycopy(bytes3, 0, bandEncoded, bytes1.length + bytes2.length,
bytes3.length);
RunCodec runCodec = new RunCodec(3, Codec.UDELTA5, new RunCodec(3,
Codec.BYTE1, Codec.UNSIGNED5));
int[] bandDecoded = runCodec.decodeInts(9, new ByteArrayInputStream(
bandEncoded));
assertEquals(band.length, bandDecoded.length);
for (int i = 0; i < band.length; i++) {
assertEquals(band[i], bandDecoded[i]);
}
}
public void testToString() throws Pack200Exception {
RunCodec runCodec = new RunCodec(3, Codec.UNSIGNED5, Codec.BYTE1);
assertEquals(
"RunCodec[k=" + 3 + ";aCodec=" + Codec.UNSIGNED5.toString()
+ "bCodec=" + Codec.BYTE1.toString() + "]",
runCodec.toString());
}
public void testEncodeSingleValue() {
try {
new RunCodec(10, BHSDCodec.SIGNED5, BHSDCodec.UDELTA5).encode(5);
fail("Should not allow a single value to be encoded as we don't know which codec to use");
} catch (Pack200Exception e) {
// pass
}
try {
new RunCodec(10, BHSDCodec.SIGNED5, BHSDCodec.UDELTA5).encode(5, 8);
fail("Should not allow a single value to be encoded as we don't know which codec to use");
} catch (Pack200Exception e) {
// pass
}
}
}