src/test/java/com/android/tools/r8/maindexlist/MainDexListMergeInRootTest.java

// Copyright (c) 2021, 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.maindexlist;

import com.android.tools.r8.NeverClassInline;
import com.android.tools.r8.NeverInline;
import com.android.tools.r8.NoHorizontalClassMerging;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import com.android.tools.r8.utils.codeinspector.HorizontallyMergedClassesInspector;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class MainDexListMergeInRootTest extends TestBase {

  private final TestParameters parameters;

  @Parameters(name = "{0}")
  public static TestParametersCollection data() {
    return getTestParameters()
        .withDexRuntimes()
        .withApiLevelsEndingAtExcluding(apiLevelWithNativeMultiDexSupport())
        .build();
  }

  public MainDexListMergeInRootTest(TestParameters parameters) {
    this.parameters = parameters;
  }

  @Test
  public void testMainDexTracing() throws Exception {
    testForR8(parameters.getBackend())
        .addProgramClasses(OutsideMainDex.class, InsideA.class, InsideB.class, Main.class)
        .addKeepClassAndMembersRules(Main.class)
        .setMinApi(parameters.getApiLevel())
        .enableNeverClassInliningAnnotations()
        .enableNoHorizontalClassMergingAnnotations()
        .enableInliningAnnotations()
        .noMinification()
        .addMainDexRules(
            "-keep class " + Main.class.getTypeName() + " { public static void main(***); }")
        .addOptionsModification(
            options -> {
              options.testing.checkForNotExpandingMainDexTracingResult = true;
            })
        // TODO(b/178151906): See if we can merge the classes.
        .addHorizontallyMergedClassesInspector(
            HorizontallyMergedClassesInspector::assertNoClassesMerged)
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("InsideB::live0", "InsideA::live");
  }

  @NoHorizontalClassMerging
  @NeverClassInline
  public static class OutsideMainDex {

    @NeverInline
    public void print(int i) {
      System.out.println("OutsideMainDex::print" + i);
    }
  }

  @NeverClassInline
  public static class InsideA {

    public void bar() {
      System.out.println("InsideA::live");
    }

    /* Not a traced root */
    @NeverInline
    public void foo(int i) {
      new OutsideMainDex().print(i);
    }
  }

  @NeverClassInline
  public static class InsideB {

    @NeverInline
    public void foo(int i) {
      System.out.println("InsideB::live" + i);
    }
  }

  public static class Main {

    public static void main(String[] args) {
      new InsideB().foo(args.length);
      new InsideA().bar();
    }

    public void keptToKeepInsideANotLive() {
      new InsideA().foo(System.currentTimeMillis() > 0 ? 0 : 1);
    }
  }
}