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/*
* 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.commons.compress.compressors.zstandard;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.commons.compress.AbstractTestCase;
import org.apache.commons.compress.compressors.CompressorInputStream;
import org.apache.commons.compress.compressors.CompressorOutputStream;
import org.apache.commons.compress.compressors.CompressorStreamFactory;
import org.apache.commons.compress.utils.IOUtils;
import org.junit.Assert;
import org.junit.Test;
public class ZstdRoundtripTest extends AbstractTestCase {
private interface OutputStreamCreator {
ZstdCompressorOutputStream wrap(FileOutputStream os) throws IOException;
}
@Test
public void directRoundtrip() throws Exception {
roundtrip(new OutputStreamCreator() {
@Override
public ZstdCompressorOutputStream wrap(FileOutputStream os) throws IOException {
return new ZstdCompressorOutputStream(os);
}
});
}
private void roundtrip(OutputStreamCreator oc) throws IOException {
File input = getFile("bla.tar");
long start = System.currentTimeMillis();
final File output = new File(dir, input.getName() + ".zstd");
try (FileInputStream is = new FileInputStream(input);
FileOutputStream os = new FileOutputStream(output);
ZstdCompressorOutputStream zos = oc.wrap(os)) {
IOUtils.copy(is, zos);
}
System.err.println(input.getName() + " written, uncompressed bytes: " + input.length()
+ ", compressed bytes: " + output.length() + " after " + (System.currentTimeMillis() - start) + "ms");
start = System.currentTimeMillis();
try (FileInputStream is = new FileInputStream(input);
ZstdCompressorInputStream zis = new ZstdCompressorInputStream(new FileInputStream(output))) {
byte[] expected = IOUtils.toByteArray(is);
byte[] actual = IOUtils.toByteArray(zis);
Assert.assertArrayEquals(expected, actual);
}
System.err.println(output.getName() + " read after " + (System.currentTimeMillis() - start) + "ms");
}
@Test
public void factoryRoundtrip() throws Exception {
File input = getFile("bla.tar");
long start = System.currentTimeMillis();
final File output = new File(dir, input.getName() + ".zstd");
try (FileInputStream is = new FileInputStream(input);
FileOutputStream os = new FileOutputStream(output);
CompressorOutputStream zos = new CompressorStreamFactory().createCompressorOutputStream("zstd", os)) {
IOUtils.copy(is, zos);
}
start = System.currentTimeMillis();
try (FileInputStream is = new FileInputStream(input);
CompressorInputStream zis = new CompressorStreamFactory()
.createCompressorInputStream("zstd", new FileInputStream(output))) {
byte[] expected = IOUtils.toByteArray(is);
byte[] actual = IOUtils.toByteArray(zis);
Assert.assertArrayEquals(expected, actual);
}
}
@Test
public void roundtripWithCustomLevel() throws Exception {
roundtrip(new OutputStreamCreator() {
@Override
public ZstdCompressorOutputStream wrap(FileOutputStream os) throws IOException {
return new ZstdCompressorOutputStream(os, 1);
}
});
}
@Test
public void roundtripWithCloseFrameOnFlush() throws Exception {
roundtrip(new OutputStreamCreator() {
@Override
public ZstdCompressorOutputStream wrap(FileOutputStream os) throws IOException {
return new ZstdCompressorOutputStream(os, 3, true);
}
});
}
@Test
public void roundtripWithChecksum() throws Exception {
roundtrip(new OutputStreamCreator() {
@Override
public ZstdCompressorOutputStream wrap(FileOutputStream os) throws IOException {
return new ZstdCompressorOutputStream(os, 3, false, true);
}
});
}
}
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