src/test/java/com/android/tools/r8/internal/R8DisassemblerTest.java

// Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.internal;

import static com.android.tools.r8.utils.AndroidApp.DEFAULT_PROGUARD_MAP_FILE;

import com.android.tools.r8.CompilationException;
import com.android.tools.r8.R8;
import com.android.tools.r8.R8Command;
import com.android.tools.r8.shaking.ProguardRuleParserException;
import com.android.tools.r8.utils.FileUtils;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
import org.junit.Test;
import org.junit.experimental.theories.Theories;
import org.junit.runner.RunWith;

// Invoke R8 on the dex files extracted from GMSCore.apk to disassemble the dex code.
@RunWith(Theories.class)
public class R8DisassemblerTest {

  static final String APP_DIR = "third_party/gmscore/v5/";

  public boolean deobfuscate;

  @Test
  public void disassemble() throws IOException, ExecutionException, ProguardRuleParserException,
      CompilationException {
    // This test only ensures that we do not break disassembling of dex code. It does not
    // check the generated code. To make it fast, we get rid of the output.
    PrintStream originalOut = System.out;
    System.setOut(new PrintStream(new OutputStream() {
      public void write(int b) { /* ignore*/ }
    }));

    try {
      R8Command.Builder builder = R8Command.builder();
      if (deobfuscate) {
        builder.setProguardMapFile(Paths.get(APP_DIR, DEFAULT_PROGUARD_MAP_FILE));
      }
      builder.addProgramFiles(
          Files.list(Paths.get(APP_DIR))
              .filter(FileUtils::isDexFile)
              .collect(Collectors.toList()));
      R8.disassemble(builder.build());
    } finally {
      // Restore System.out for good measure.
      System.setOut(originalOut);
    }
  }
}