src/test/java/com/android/tools/r8/classmerging/vertical/VerticalClassMergingWithGetNameTest.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.classmerging.vertical;

import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static org.hamcrest.MatcherAssert.assertThat;

import com.android.tools.r8.NeverInline;
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.ClassSubject;
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 VerticalClassMergingWithGetNameTest extends TestBase {

  private final TestParameters parameters;

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

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

  @Test
  public void test() throws Exception {
    testForR8(parameters.getBackend())
        .addInnerClasses(getClass())
        .addKeepMainRule(Main.class)
        .addVerticallyMergedClassesInspector(
            inspector -> inspector.assertMergedIntoSubtype(A.class))
        .enableInliningAnnotations()
        .setMinApi(parameters.getApiLevel())
        .compile()
        .run(parameters.getRuntime(), Main.class)
        .apply(
            runResult -> {
              ClassSubject bClassSubject = runResult.inspector().clazz(B.class);
              assertThat(bClassSubject, isPresent());
              runResult.assertSuccessWithOutputLines(
                  bClassSubject.getFinalName(), bClassSubject.getFinalName());
            });
  }

  static class Main {

    public static void main(String[] args) {
      new B().print();
    }
  }

  static class A {

    @NeverInline
    public void print() {
      System.out.println(A.class.getName());
    }
  }

  static class B extends A {

    @NeverInline
    public void print() {
      super.print();
      System.out.println(B.class.getName());
    }
  }
}