| // 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.desugar; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.utils.StringUtils; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| import org.junit.runners.Parameterized.Parameters; |
| |
| // Test if the static method of the lambda implementation (SINGLE_CALLER) is inlined into the |
| // interface method of the lambda class. |
| @RunWith(Parameterized.class) |
| public class DesugaredLambdaImplementationInliningTest extends TestBase { |
| |
| static final String EXPECTED = |
| StringUtils.lines( |
| "Running desugared stateless lambda.", |
| "Running desugared stateful lambda: lambda-state."); |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| final TestParameters parameters; |
| |
| public DesugaredLambdaImplementationInliningTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| class Counter { |
| private int i = 0; |
| } |
| Counter counter = new Counter(); |
| testForR8Compat(parameters.getBackend()) |
| .addProgramClasses(TestClass.class) |
| .addKeepMainRule(TestClass.class) |
| .noMinification() |
| .setMinApi(parameters.getApiLevel()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .inspector() |
| .clazz(TestClass.class) |
| .forAllMethods( |
| fms -> { |
| if (fms.isStatic() && !fms.getOriginalName().equals("main")) { |
| ++counter.i; |
| } |
| }); |
| // On CF the lambdas remain. |
| assertEquals(parameters.isDexRuntime() ? 0 : 2, counter.i); |
| } |
| |
| static class TestClass { |
| public static void main(String[] args) { |
| Runnable runnable = () -> System.out.println("Running desugared stateless lambda."); |
| runnable.run(); |
| |
| String s = "lambda-state"; |
| runnable = () -> System.out.println("Running desugared stateful lambda: " + s + "."); |
| runnable.run(); |
| } |
| } |
| } |