src/test/java/com/android/tools/r8/optimize/argumentpropagation/InterfaceInvokeWithNonTrivialButImpreciseStaticTypeTest.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.optimize.argumentpropagation;

import com.android.tools.r8.NoHorizontalClassMerging;
import com.android.tools.r8.NoVerticalClassMerging;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import com.android.tools.r8.references.Reference;
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 InterfaceInvokeWithNonTrivialButImpreciseStaticTypeTest extends TestBase {

  @Parameter(0)
  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)
        .addOptionsModification(
            options ->
                // TODO(b/236581210): I is spuriously reported as being "open" due to lossy joins in
                //  the analysis of cf code.
                options
                    .getOpenClosedInterfacesOptions()
                    .suppressSingleOpenInterface(Reference.classFromClass(I.class)))
        .enableNoHorizontalClassMergingAnnotations()
        .enableNoVerticalClassMergingAnnotations()
        .setMinApi(parameters.getApiLevel())
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("B");
  }

  static class Main {

    public static void main(String[] args) {
      I i = System.currentTimeMillis() > 0 ? new B() : new C();
      i.m();
    }
  }

  @NoVerticalClassMerging
  interface I {

    void m();
  }

  static class A {}

  @NoHorizontalClassMerging
  static class B extends A implements I {

    @Override
    public void m() {
      System.out.println("B");
    }
  }

  @NoHorizontalClassMerging
  static class C extends A implements I {

    @Override
    public void m() {
      System.out.println("C");
    }
  }
}