| // 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.desugaring.interfacemethods; |
| |
| import static org.hamcrest.CoreMatchers.containsString; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assume.assumeTrue; |
| |
| import com.android.tools.r8.CompilationFailedException; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestDiagnosticMessages; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.utils.StringUtils; |
| import com.google.common.collect.ImmutableList; |
| import java.util.Collection; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class DefaultInterfaceMethodDesugaringImpossibleTest extends TestBase { |
| |
| private static final String EXPECTED = StringUtils.lines("I.m()"); |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public DefaultInterfaceMethodDesugaringImpossibleTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| private Collection<Class<?>> getProgramClasses() { |
| return ImmutableList.of(TestClass.class, I.class); |
| } |
| |
| private Collection<byte[]> getProgramClassData() throws Exception { |
| return ImmutableList.of( |
| transformer(A.class) |
| .setAccessFlags( |
| A.class.getDeclaredMethod("m"), |
| flags -> { |
| assert flags.isPublic(); |
| flags.unsetPublic(); |
| flags.setPrivate(); |
| flags.setStatic(); |
| }) |
| .transform()); |
| } |
| |
| @Test |
| public void testJVM() throws Exception { |
| assumeTrue(parameters.isCfRuntime()); |
| testForJvm() |
| .addProgramClasses(getProgramClasses()) |
| .addProgramClassFileData(getProgramClassData()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| } |
| |
| @Test |
| public void testD8() throws Exception { |
| assumeTrue(parameters.isDexRuntime()); |
| try { |
| testForD8() |
| .addProgramClasses(getProgramClasses()) |
| .addProgramClassFileData(getProgramClassData()) |
| .setMinApi(parameters.getApiLevel()) |
| .compileWithExpectedDiagnostics(this::checkDesugarError) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| assertTrue(parameters.canUseDefaultAndStaticInterfaceMethods()); |
| } catch (CompilationFailedException e) { |
| assertFalse(parameters.canUseDefaultAndStaticInterfaceMethods()); |
| } |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| try { |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(getProgramClasses()) |
| .addProgramClassFileData(getProgramClassData()) |
| .addKeepAllClassesRule() |
| .setMinApi(parameters.getApiLevel()) |
| .compileWithExpectedDiagnostics(this::checkDesugarError) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| assertTrue(parameters.canUseDefaultAndStaticInterfaceMethods()); |
| } catch (CompilationFailedException e) { |
| assertFalse(parameters.canUseDefaultAndStaticInterfaceMethods()); |
| } |
| } |
| |
| private void checkDesugarError(TestDiagnosticMessages diagnostics) { |
| if (!parameters.canUseDefaultAndStaticInterfaceMethods()) { |
| diagnostics.assertErrorMessageThatMatches(containsString("forwarding method that conflicts")); |
| } |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| I a = new A(); |
| a.m(); |
| } |
| } |
| |
| interface I { |
| |
| default void m() { |
| System.out.println("I.m()"); |
| } |
| } |
| |
| static class A implements I { |
| |
| public /* will be: private static */ void m() { |
| System.out.println("A.m()"); |
| } |
| } |
| } |