src/test/java/com/android/tools/r8/shaking/methods/interfaces/InterfaceAbstractTriangleTest.java

// Copyright (c) 2019, 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.shaking.methods.interfaces;

import com.android.tools.r8.CompilationFailedException;
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 java.io.IOException;
import java.util.concurrent.ExecutionException;
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 InterfaceAbstractTriangleTest extends TestBase {

  private final TestParameters parameters;

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

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

  @Test
  public void shouldKeepA() throws CompilationFailedException, IOException, ExecutionException {
    R8TestCompileResult libraryResult =
        testForR8(parameters.getBackend())
            .addProgramClasses(I.class, J.class, A.class)
            .setMinApi(parameters.getApiLevel())
            .addKeepMethodRules(A.class, "void foo()", "void <init>()")
            .compile();
    testForRuntime(parameters)
        .addProgramClasses(B.class, Main.class)
        .addRunClasspathFiles(libraryResult.writeToZip())
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("Hello World!");
  }

  public interface I {

    void foo();
  }

  public interface J {

    void foo();
  }

  public abstract static class A implements I, J {}

  public static class B extends A {

    @Override
    public void foo() {
      System.out.println("Hello World!");
    }
  }

  public static class Main {

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