/*
* 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.EOFException;
import java.io.IOException;
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.RunCodec;
/**
*
*/
public class CodecTest extends TestCase {
public void testInvalidCodings() {
for (int i = 0; i < 256; i++) {
try {
new BHSDCodec(1, i);
fail("b=1 -> h=256");
} catch (IllegalArgumentException e) {
assertTrue(true);
}
}
for (int i = 1; i <= 5; i++) {
try {
new BHSDCodec(i, 256);
if (i == 5)
fail("h=256 -> b!=5");
} catch (IllegalArgumentException e) {
assertTrue(true);
}
}
}
public void testCodecToString() {
assertEquals("(1,256)", Codec.BYTE1.toString());
assertEquals("(3,128)", Codec.CHAR3.toString());
assertEquals("(5,4)", Codec.BCI5.toString());
assertEquals("(5,4,2)", Codec.BRANCH5.toString());
assertEquals("(5,64)", Codec.UNSIGNED5.toString());
assertEquals("(5,64,1)", Codec.SIGNED5.toString());
assertEquals("(5,64,0,1)", Codec.UDELTA5.toString());
assertEquals("(5,64,1,1)", Codec.DELTA5.toString());
assertEquals("(5,64,2,1)", Codec.MDELTA5.toString());
assertEquals("(5,64)", Codec.UNSIGNED5.toString());
assertEquals("(5,64,1)", Codec.SIGNED5.toString());
assertEquals("(5,64,1,1)", Codec.DELTA5.toString());
assertEquals("(5,64,2,1)", Codec.MDELTA5.toString());
}
public void testByte1() throws Exception {
for (int i = 0; i < 255; i++)
decode(Codec.BYTE1, new byte[] { (byte) i }, i, 0);
}
public void testByte1Delta() throws Exception {
Codec BYTE1D = new BHSDCodec(1, 256, 0, 1);
long last = 0;
for (int i = 1; i < 255; i++)
last = decode(BYTE1D, new byte[] { (byte) 1 }, i, last);
}
public void testByte1DeltaException() throws Exception {
Codec BYTE1D = new BHSDCodec(1, 256, 0, 1);
try {
BYTE1D.decode(new ByteArrayInputStream(new byte[] { (byte) 1 }));
fail("Decoding with a delta stream and not passing a last value should throw exception");
} catch (Pack200Exception e) {
assertTrue(true);
}
}
public void testByte1Signed() throws Exception {
Codec BYTE1S2 = new BHSDCodec(1,256,2);
decode(BYTE1S2,new byte[] { 0 }, 0, 0);
decode(BYTE1S2,new byte[] { 1 }, 1, 0);
decode(BYTE1S2,new byte[] { 2 }, 2, 0);
decode(BYTE1S2,new byte[] { 3 }, -1, 0);
decode(BYTE1S2,new byte[] { 4 }, 3, 0);
decode(BYTE1S2,new byte[] { 5 }, 4, 0);
decode(BYTE1S2,new byte[] { 6 }, 5, 0);
decode(BYTE1S2,new byte[] { 7 }, -2, 0);
decode(BYTE1S2,new byte[] { 8 }, 6, 0);
decode(BYTE1S2,new byte[] { 9 }, 7, 0);
decode(BYTE1S2,new byte[] { 10 }, 8, 0);
decode(BYTE1S2,new byte[] { 11 }, -3, 0);
}
public void testCardinality() throws Exception {
BHSDCodec byte1 = Codec.BYTE1;
assertEquals(256,byte1.cardinality());
assertEquals(0,byte1.smallest());
assertEquals(255,byte1.largest());
assertFalse(byte1.encodes(-257));
assertFalse(byte1.encodes(-256));
assertFalse(byte1.encodes(-255));
assertFalse(byte1.encodes(-129));
assertFalse(byte1.encodes(-128));
assertFalse(byte1.encodes(-127));
assertFalse(byte1.encodes(-1));
assertTrue(byte1.encodes(0));
assertTrue(byte1.encodes(1));
assertTrue(byte1.encodes(255));
assertFalse(byte1.encodes(256));
BHSDCodec byte1s = new BHSDCodec(1,256,1);
assertEquals(256,byte1s.cardinality());
assertEquals(-128,byte1s.smallest());
assertEquals(127,byte1s.largest());
assertFalse(byte1s.encodes(-257));
assertFalse(byte1s.encodes(-256));
assertFalse(byte1s.encodes(-255));
assertFalse(byte1s.encodes(-129));
assertTrue(byte1s.encodes(-128));
assertTrue(byte1s.encodes(-127));
assertTrue(byte1s.encodes(-1));
assertTrue(byte1s.encodes(0));
assertTrue(byte1s.encodes(1));
assertTrue(byte1s.encodes(127));
assertFalse(byte1s.encodes(128));
assertFalse(byte1s.encodes(129));
assertFalse(byte1s.encodes(255));
assertFalse(byte1s.encodes(256));
BHSDCodec byte2s = new BHSDCodec(1,256,2);
assertEquals(256,byte2s.cardinality());
assertEquals(-64,byte2s.smallest());
assertEquals(191,byte2s.largest());
assertFalse(byte2s.encodes(-257));
assertFalse(byte2s.encodes(-256));
assertFalse(byte2s.encodes(-255));
assertFalse(byte2s.encodes(-129));
assertFalse(byte2s.encodes(-128));
assertFalse(byte2s.encodes(-127));
assertFalse(byte2s.encodes(-65));
assertTrue(byte2s.encodes(-64));
assertTrue(byte2s.encodes(-64));
assertTrue(byte2s.encodes(-1));
assertTrue(byte2s.encodes(0));
assertTrue(byte2s.encodes(1));
assertTrue(byte2s.encodes(127));
assertTrue(byte2s.encodes(128));
assertTrue(byte2s.encodes(191));
assertFalse(byte2s.encodes(192));
assertFalse(byte2s.encodes(256));
}
public void testRunCodec() 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 testUnsigned5() throws Exception {
decode(Codec.UNSIGNED5, new byte[] { 1 }, 1, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 191 }, 191, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, 0 }, 192, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 193, 0 }, 193, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 255, 0 }, 255, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, 1 }, 256, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, 5 }, 512, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, 13 }, 1024, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, 29 }, 2048, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 255, (byte) 191 }, 12479, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192, 0 },
12480, 0);
decode(Codec.UNSIGNED5,
new byte[] { (byte) 255, (byte) 255, (byte) 191 }, 798911, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192,
(byte) 192, 0 }, 798912, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 255, (byte) 255,
(byte) 255, (byte) 191 }, 51130559, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192,
(byte) 192, (byte) 192, 0 }, 51130560, 0);
decode(Codec.UNSIGNED5, new byte[] { (byte) 255, (byte) 252,
(byte) 252, (byte) 252, (byte) 252 }, 0xFFFFFFFFL, 0);
decodeFail(Codec.UNSIGNED5, new byte[] { (byte) 192 });
decodeFail(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192 });
decodeFail(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192,
(byte) 192 });
decodeFail(Codec.UNSIGNED5, new byte[] { (byte) 192, (byte) 192,
(byte) 192, (byte) 192 });
}
private void decodeFail(final Codec codec, final byte[] data)
throws IOException, Pack200Exception {
try {
decode(codec, data, 0, 0);
fail("Should have detected an EOFException");
} catch (EOFException e) {
assertTrue(true);
}
}
private long decode(final Codec codec, final byte[] data, final long value,
final long last) throws IOException, Pack200Exception {
final ByteArrayInputStream in = new ByteArrayInputStream(data);
assertEquals(value, codec.decode(in, last));
assertEquals(-1, in.read());
return (value);
}
}