src/test/java/com/android/tools/r8/classmerging/horizontal/StaticAndVirtualMethodCollisionTest.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.horizontal;

import static com.android.tools.r8.utils.codeinspector.AssertUtils.assertFailsCompilationIf;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.MatcherAssert.assertThat;

import com.android.tools.r8.NeverClassInline;
import com.android.tools.r8.NeverInline;
import com.android.tools.r8.TestParameters;
import org.junit.Test;

public class StaticAndVirtualMethodCollisionTest extends HorizontalClassMergingTestBase {

  public StaticAndVirtualMethodCollisionTest(
      TestParameters parameters, boolean enableHorizontalClassMerging) {
    super(parameters, enableHorizontalClassMerging);
  }

  @Test
  public void test() throws Exception {
    // TODO(b/172415620): Handle static/virtual method collisions.
    assertFailsCompilationIf(
        enableHorizontalClassMerging,
        () ->
            testForR8(parameters.getBackend())
                .addInnerClasses(getClass())
                .addKeepMainRule(Main.class)
                .addOptionsModification(
                    options -> options.enableHorizontalClassMerging = enableHorizontalClassMerging)
                .addHorizontallyMergedClassesInspectorIf(
                    enableHorizontalClassMerging,
                    inspector -> inspector.assertMergedInto(B.class, A.class))
                .enableInliningAnnotations()
                .enableNeverClassInliningAnnotations()
                .setMinApi(parameters.getApiLevel())
                .run(parameters.getRuntime(), Main.class)
                .assertSuccessWithOutputLines("A.foo()", "A.bar()", "B.foo()", "B.bar()"),
        e -> assertThat(e.getCause().getMessage(), containsString("Duplicate method")));
  }

  static class Main {

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

  @NeverClassInline
  static class A {

    @NeverInline
    public static void foo() {
      System.out.println("A.foo()");
    }

    @NeverInline
    public void bar() {
      System.out.println("A.bar()");
    }
  }

  @NeverClassInline
  static class B {

    @NeverInline
    public void foo() {
      System.out.println("B.foo()");
    }

    @NeverInline
    public static void bar() {
      System.out.println("B.bar()");
    }
  }
}