src/test/java/com/android/tools/r8/enumunboxing/RedundantValuesCloneEnumUnboxingTest.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.enumunboxing;

import static com.android.tools.r8.utils.codeinspector.CodeMatchers.invokesMethodWithName;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.MatcherAssert.assertThat;

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;

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

  @Parameter public TestParameters parameters;

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

  @Test
  public void test() throws Exception {
    testForR8(parameters.getBackend())
        .addInnerClasses(getClass())
        .addKeepMainRule(Main.class)
        .addEnumUnboxingInspector(inspector -> inspector.assertUnboxed(MyEnum.class))
        .setMinApi(parameters.getApiLevel())
        .compile()
        // Verify that there are no calls to clone().
        .inspect(
            inspector ->
                inspector.forAllClasses(
                    clazz ->
                        clazz.forAllMethods(
                            method -> assertThat(method, not(invokesMethodWithName("clone"))))))
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("A");
  }

  static class Main {

    public static void main(String[] args) {
      for (MyEnum e : MyEnum.values()) {
        System.out.println(e.name());
      }
    }
  }

  enum MyEnum {
    A
  }
}