| // 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; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| 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 PreserveDesugaredLambdaTest extends TestBase { |
| |
| public interface Interface { |
| void computeTheFoo(); |
| } |
| |
| public static class A { |
| static void doFoo(Interface i) { |
| i.computeTheFoo(); |
| } |
| } |
| |
| public static class Main { |
| public static void main(String[] args) { |
| // The desugared lambda should be preserved. |
| A.doFoo(() -> System.out.println("Hello World!")); |
| } |
| } |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withDexRuntimes().withAllApiLevels().build(); |
| } |
| |
| public PreserveDesugaredLambdaTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testKeepDesugaredLambdaMembers() |
| throws IOException, CompilationFailedException, ExecutionException { |
| R8TestCompileResult libraryCompileResult = |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(Interface.class, A.class) |
| .addKeepAllClassesRule() |
| .setMinApi(parameters.getApiLevel()) |
| .compile(); |
| // A is not passed in to ensure the Enqueuer is not tracing through classpath to see the use of |
| // computeFoo(). |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(Main.class) |
| .addClasspathClasses(Interface.class) |
| .addLibraryFiles(TestBase.runtimeJar(parameters.getBackend())) |
| .addKeepAllClassesRule() |
| .addDontWarn(A.class) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .addRunClasspathFiles(libraryCompileResult.writeToZip()) |
| .inspect( |
| codeInspector -> |
| assertTrue( |
| codeInspector.allClasses().stream() |
| .anyMatch( |
| c -> { |
| if (c.isSynthesizedJavaLambdaClass()) { |
| assertThat( |
| c.uniqueMethodWithOriginalName("computeTheFoo"), isPresent()); |
| return true; |
| } |
| return false; |
| }))) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLines("Hello World!"); |
| } |
| } |