| // 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.desugar; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import com.android.tools.r8.NeverInline; |
| 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 com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.FoundMethodSubject; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class DesugarInstanceLambdaWithReadsTest extends TestBase { |
| |
| static final String EXPECTED = StringUtils.lines("false"); |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().withAllApiLevels().build(); |
| } |
| |
| public DesugarInstanceLambdaWithReadsTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testReference() throws Exception { |
| testForRuntime(parameters) |
| .addProgramClasses(Main.class, A.class, B.class, Consumer.class) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .inspect(this::checkJustOneLambdaImplementationMethod); |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(Main.class, A.class, B.class, Consumer.class) |
| .addKeepClassRules(Consumer.class) |
| .addKeepMainRule(Main.class) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .inspect(this::checkJustOneLambdaImplementationMethod); |
| } |
| |
| private void checkJustOneLambdaImplementationMethod(CodeInspector inspector) { |
| List<FoundMethodSubject> lambdaImplementationMethods = |
| inspector.clazz(Main.class).allMethods(m -> m.getOriginalName().startsWith("lambda$")); |
| assertEquals(1, lambdaImplementationMethods.size()); |
| } |
| |
| private interface Consumer { |
| void accept(String arg); |
| } |
| |
| abstract static class A { |
| abstract boolean contains(String item); |
| } |
| |
| // A is expected to be merged into B. |
| static class B extends A { |
| final List<String> items; |
| |
| public B(List<String> items) { |
| this.items = items; |
| } |
| |
| @NeverInline |
| @Override |
| boolean contains(String item) { |
| return items.contains(item); |
| } |
| } |
| |
| static class Main { |
| // Field that is read from the lambda$ method. |
| A filter; |
| |
| public Main(A filter) { |
| this.filter = filter; |
| } |
| |
| @NeverInline |
| public static void forEach(List<String> args, Consumer fn) { |
| for (String arg : args) { |
| fn.accept(arg); |
| } |
| } |
| |
| public void foo(List<String> args) { |
| forEach(args, arg -> System.out.println(filter.contains(arg))); |
| } |
| |
| public static void main(String[] args) { |
| new Main(new B(Arrays.asList(args))).foo(Collections.singletonList("hello!")); |
| } |
| } |
| } |