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/*******************************************************************************
* Copyright (c) 2009, 2023 Mountainminds GmbH & Co. KG and Contributors
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FilterInputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.jar.JarInputStream;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.jacoco.core.test.TargetLoader;
import org.junit.AssumptionViolatedException;
import org.junit.Test;
/**
* Unit tests for {@link Pack200Streams}.
*/
public class Pack200StreamsTest {
@Test
public void pack_should_pack() throws Exception {
try {
Class.forName("java.util.jar.Pack200");
} catch (ClassNotFoundException e) {
throw new AssumptionViolatedException(
"this test requires JDK with Pack200");
}
ByteArrayOutputStream jarbuffer = new ByteArrayOutputStream();
ZipOutputStream zipout = new ZipOutputStream(jarbuffer);
zipout.putNextEntry(new ZipEntry("Test.class"));
zipout.write(TargetLoader.getClassDataAsBytes(getClass()));
zipout.finish();
ByteArrayOutputStream pack200buffer = new ByteArrayOutputStream();
Pack200Streams.pack(jarbuffer.toByteArray(),
new NoCloseOutputStream(pack200buffer));
jarbuffer.reset();
final Object unpacker = Class.forName("java.util.jar.Pack200")
.getMethod("newUnpacker").invoke(null);
Class.forName("java.util.jar.Pack200$Unpacker")
.getMethod("unpack", InputStream.class, JarOutputStream.class)
.invoke(unpacker,
new ByteArrayInputStream(pack200buffer.toByteArray()),
new JarOutputStream(jarbuffer));
ZipInputStream zipin = new ZipInputStream(
new ByteArrayInputStream(jarbuffer.toByteArray()));
assertEquals("Test.class", zipin.getNextEntry().getName());
assertNull(zipin.getNextEntry());
}
@Test
public void pack_should_throw_IOException_when_can_not_write_to_OutputStream() {
try {
Class.forName("java.util.jar.Pack200");
} catch (ClassNotFoundException e) {
throw new AssumptionViolatedException(
"this test requires JDK with Pack200");
}
final OutputStream outputStream = new BrokenOutputStream();
try {
Pack200Streams.pack(new byte[0], outputStream);
fail("expected exception");
} catch (IOException e) {
assertTrue(e.getCause() instanceof IOException);
assertEquals("fake broken output stream",
e.getCause().getMessage());
}
}
@Test
public void pack_should_throw_IOException_when_Pack200_not_available_in_JDK() {
try {
Class.forName("java.util.jar.Pack200");
throw new AssumptionViolatedException(
"this test requires JDK without Pack200");
} catch (ClassNotFoundException ignore) {
}
try {
Pack200Streams.pack(new byte[0], new ByteArrayOutputStream());
fail("expected exception");
} catch (IOException e) {
assertNull(e.getMessage());
assertTrue(e.getCause() instanceof ClassNotFoundException);
}
}
@Test
public void unpack_should_unpack() throws Exception {
try {
Class.forName("java.util.jar.Pack200");
} catch (ClassNotFoundException e) {
throw new AssumptionViolatedException(
"this test requires JDK with Pack200");
}
ByteArrayOutputStream jarbuffer = new ByteArrayOutputStream();
ZipOutputStream zipout = new ZipOutputStream(jarbuffer);
zipout.putNextEntry(new ZipEntry("Test.class"));
zipout.write(TargetLoader.getClassDataAsBytes(getClass()));
zipout.finish();
ByteArrayOutputStream pack200buffer = new ByteArrayOutputStream();
final Object packer = Class.forName("java.util.jar.Pack200")
.getMethod("newPacker").invoke(null);
Class.forName("java.util.jar.Pack200$Packer")
.getMethod("pack", JarInputStream.class, OutputStream.class)
.invoke(packer, new JarInputStream(
new ByteArrayInputStream(jarbuffer.toByteArray())),
pack200buffer);
InputStream result = Pack200Streams.unpack(new NoCloseInputStream(
new ByteArrayInputStream(pack200buffer.toByteArray())));
ZipInputStream zipin = new ZipInputStream(result);
assertEquals("Test.class", zipin.getNextEntry().getName());
assertNull(zipin.getNextEntry());
}
@Test
public void unpack_should_throw_IOException_when_can_not_read_from_InputStream() {
try {
Class.forName("java.util.jar.Pack200");
} catch (ClassNotFoundException e) {
throw new AssumptionViolatedException(
"this test requires JDK with Pack200");
}
final InputStream inputStream = new BrokenInputStream();
try {
Pack200Streams.unpack(inputStream);
fail("expected exception");
} catch (IOException e) {
assertTrue(e.getCause() instanceof IOException);
assertEquals("fake broken input stream", e.getCause().getMessage());
}
}
@Test
public void unpack_should_throw_IOException_when_Pack200_not_available_in_JDK() {
try {
Class.forName("java.util.jar.Pack200");
throw new AssumptionViolatedException(
"this test requires JDK without Pack200");
} catch (ClassNotFoundException ignore) {
}
try {
Pack200Streams.unpack(new ByteArrayInputStream(new byte[0]));
fail("expected exception");
} catch (IOException e) {
assertNull(e.getMessage());
assertTrue(e.getCause() instanceof ClassNotFoundException);
}
}
static class NoCloseInputStream extends FilterInputStream {
public NoCloseInputStream(InputStream in) {
super(in);
}
@Override
public void close() throws IOException {
fail();
}
}
static class NoCloseOutputStream extends FilterOutputStream {
public NoCloseOutputStream(OutputStream out) {
super(out);
}
@Override
public void close() throws IOException {
fail();
}
}
private static class BrokenInputStream extends InputStream {
@Override
public int read() throws IOException {
throw new IOException("fake broken input stream");
}
}
private static class BrokenOutputStream extends OutputStream {
@Override
public void write(int b) throws IOException {
throw new IOException("fake broken output stream");
}
}
}
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