src/test/java/com/android/tools/r8/desugar/backports/AtomicReferenceFieldUpdaterTest.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.desugar.backports;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.ToolHelper.DexVm.Version;
import com.android.tools.r8.utils.AndroidApiLevel;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class AtomicReferenceFieldUpdaterTest extends AbstractBackportTest {

  @Parameters(name = "{0}")
  public static Iterable<?> data() {
    return getTestParameters()
        .withDexRuntimesStartingFromExcluding(Version.V4_0_4)
        .withAllApiLevels()
        .build();
  }

  public AtomicReferenceFieldUpdaterTest(TestParameters parameters) {
    super(parameters, AtomicReferenceFieldUpdater.class, Main.class);

    ignoreInvokes("newUpdater");

    // java.util.concurrent.atomic.AtomicReferenceFieldUpdater issue is on API 31, see b/211646483.
    registerTarget(AndroidApiLevel.Sv2, 3);
  }

  public static class Main extends MiniAssert {
    public volatile String field;

    public static void main(String[] args) throws Exception {
      AtomicReferenceFieldUpdater<Main, String> updater =
          AtomicReferenceFieldUpdater.newUpdater(Main.class, String.class, "field");
      Main x = new Main();
      assertTrue(updater.compareAndSet(x, null, "A"));
      assertTrue(updater.compareAndSet(x, "A", "B"));
      assertFalse(updater.compareAndSet(x, "A", "B"));
    }
  }
}