src/test/java/com/android/tools/r8/ir/optimize/switches/SwitchMapWithEnumDependencyTest.java

// Copyright (c) 2020, 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.ir.optimize.switches;

import com.android.tools.r8.NeverInline;
import com.android.tools.r8.R8TestCompileResult;
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.Parameters;

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

  private final TestParameters parameters;
  private static final String[] EXPECTED_RESULT = {"AD", "SB", "BE", "SC", "CF"};

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

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

  @Test
  public void test() throws Exception {
    R8TestCompileResult compile =
        testForR8(parameters.getBackend())
            .addInnerClasses(SwitchMapWithEnumDependencyTest.class)
            .addKeepMainRule(TestClass.class)
            .addDontObfuscate()
            .enableInliningAnnotations()
            .setMinApi(parameters.getApiLevel())
            .compile();
    compile
        .run(parameters.getRuntime(), TestClass.class)
        .assertSuccessWithOutputLines(EXPECTED_RESULT);
  }

  static class TestClass {
    public static void main(String[] args) {
      switchMethod();
    }

    @NeverInline
    private static void switchMethod() {
      for (MyEnum value : MyEnum.values()) {
        switch (value) {
          case B:
            System.out.println("SB");
            break;
          case C:
            System.out.println("SC");
            break;
        }
        System.out.println(value.toString());
      }
    }
  }

  enum MyEnum {
    A(MyEnumDependency.D),
    B(MyEnumDependency.E),
    C(MyEnumDependency.F);

    final MyEnumDependency dependency;

    MyEnum(MyEnumDependency dependency) {
      this.dependency = dependency;
    }

    @Override
    public String toString() {
      return super.toString() + dependency.toString();
    }
  }

  enum MyEnumDependency {
    D,
    E,
    F
  }
}