Fork of the Fernflower decompiler
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fernflower/test/org/jetbrains/java/decompiler/DecompilerTestFixture.java

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/*
* Copyright 2000-2017 JetBrains s.r.o.
*
* Licensed 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.jetbrains.java.decompiler;
import org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import java.io.File;
import java.io.IOException;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
import static org.junit.Assert.assertTrue;
public class DecompilerTestFixture {
private File testDataDir;
private File tempDir;
private File targetDir;
private TestConsoleDecompiler decompiler;
public void setUp(String... optionPairs) throws IOException {
assertThat(optionPairs.length % 2).isEqualTo(0);
testDataDir = new File("testData");
if (!isTestDataDir(testDataDir)) testDataDir = new File("community/plugins/java-decompiler/engine/testData");
if (!isTestDataDir(testDataDir)) testDataDir = new File("plugins/java-decompiler/engine/testData");
if (!isTestDataDir(testDataDir)) testDataDir = new File("../community/plugins/java-decompiler/engine/testData");
if (!isTestDataDir(testDataDir)) testDataDir = new File("../plugins/java-decompiler/engine/testData");
assertTrue("current dir: " + new File("").getAbsolutePath(), isTestDataDir(testDataDir));
testDataDir = testDataDir.getAbsoluteFile();
//noinspection SSBasedInspection
tempDir = File.createTempFile("decompiler_test_", "_dir");
assertThat(tempDir.delete()).isTrue();
targetDir = new File(tempDir, "decompiled");
assertThat(targetDir.mkdirs()).isTrue();
Map<String, Object> options = new HashMap<>();
options.put(IFernflowerPreferences.LOG_LEVEL, "warn");
options.put(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES, "1");
options.put(IFernflowerPreferences.REMOVE_SYNTHETIC, "1");
options.put(IFernflowerPreferences.REMOVE_BRIDGE, "1");
options.put(IFernflowerPreferences.LITERALS_AS_IS, "1");
options.put(IFernflowerPreferences.UNIT_TEST_MODE, "1");
for (int i = 0; i < optionPairs.length; i += 2) {
options.put(optionPairs[i], optionPairs[i + 1]);
}
decompiler = new TestConsoleDecompiler(targetDir, options);
}
public void tearDown() {
if (tempDir != null) {
delete(tempDir);
}
decompiler.close();
}
public File getTestDataDir() {
return testDataDir;
}
public File getTempDir() {
return tempDir;
}
public File getTargetDir() {
return targetDir;
}
public ConsoleDecompiler getDecompiler() {
return decompiler;
}
private static boolean isTestDataDir(File dir) {
return dir.isDirectory() && new File(dir, "classes").isDirectory() && new File(dir, "results").isDirectory();
}
private static void delete(File file) {
if (file.isDirectory()) {
File[] files = file.listFiles();
if (files != null) {
for (File f : files) delete(f);
}
}
assertTrue(file.delete());
}
public static void assertFilesEqual(File expected, File actual) {
if (expected.isDirectory()) {
String[] children = Objects.requireNonNull(expected.list());
assertThat(actual.list()).contains(children);
for (String name : children) {
assertFilesEqual(new File(expected, name), new File(actual, name));
}
}
else {
assertThat(getContent(actual)).isEqualTo(getContent(expected));
}
}
private static String getContent(File expected) {
try {
return new String(InterpreterUtil.getBytes(expected), "UTF-8").replace("\r\n", "\n");
}
catch (IOException e) {
throw new RuntimeException(e);
}
}
// cache zip files
private static class TestConsoleDecompiler extends ConsoleDecompiler {
private final HashMap<String, ZipFile> zipFiles = new HashMap<>();
public TestConsoleDecompiler(File destination, Map<String, Object> options) {
super(destination, options);
}
@Override
public byte[] getBytecode(String externalPath, String internalPath) throws IOException {
File file = new File(externalPath);
if (internalPath == null) {
return InterpreterUtil.getBytes(file);
}
else {
ZipFile archive = zipFiles.get(file.getName());
if (archive == null) {
archive = new ZipFile(file);
zipFiles.put(file.getName(), archive);
}
ZipEntry entry = archive.getEntry(internalPath);
if (entry == null) throw new IOException("Entry not found: " + internalPath);
return InterpreterUtil.getBytes(archive, entry);
}
}
void close() {
for (ZipFile file : zipFiles.values()) {
try {
file.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
zipFiles.clear();
}
}
}