src/test/java/com/android/tools/r8/classmerging/horizontal/HorizontalClassMergingInD8WithClInitOnCCTest.java

// Copyright (c) 2022, 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.classmerging.horizontal;

import com.android.tools.r8.CompilationMode;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

/** This is a regression test for b/227791663 */
@RunWith(Parameterized.class)
public class HorizontalClassMergingInD8WithClInitOnCCTest extends TestBase {

  @Parameter() public TestParameters parameters;

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

  @Test
  public void testD8() throws Exception {
    testForD8(parameters.getBackend())
        .addInnerClasses(getClass())
        .setMode(CompilationMode.RELEASE)
        .setMinApi(parameters.getApiLevel())
        .addOptionsModification(
            options -> {
              options.horizontalClassMergerOptions().enable();
              options.horizontalClassMergerOptions().setRestrictToSynthetics();
            })
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("0", "1");
  }

  public interface A {

    int value = Main.getAndIncrement();

    static int getValue() {
      return value;
    }
  }

  public interface B {

    int value = Main.getAndIncrement();

    static int getValue() {
      return value;
    }
  }

  public static class Main {

    private static int value = 0;

    public static int getAndIncrement() {
      return value++;
    }

    public static void main(String[] args) {
      System.out.println(A.getValue());
      System.out.println(B.getValue());
    }
  }
}