| // 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.lambdas; |
| |
| import static org.junit.Assume.assumeTrue; |
| |
| import com.android.tools.r8.D8TestCompileResult; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.graph.AccessFlags; |
| import com.android.tools.r8.references.ClassReference; |
| import com.android.tools.r8.references.Reference; |
| import com.android.tools.r8.transformers.ClassFileTransformer.MethodInsnTransform; |
| import com.android.tools.r8.transformers.ClassFileTransformer.TypeInsnTransform; |
| import com.android.tools.r8.utils.StringUtils; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| import org.objectweb.asm.MethodVisitor; |
| |
| @RunWith(Parameterized.class) |
| public class LegacyLambdaMergeTest extends TestBase { |
| |
| static final String EXPECTED = StringUtils.lines("Hello, world"); |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().withAllApiLevels().build(); |
| } |
| |
| public LegacyLambdaMergeTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testReference() throws Exception { |
| assumeTrue(parameters.isCfRuntime()); |
| testForJvm() |
| .addProgramClassFileData(getTransformedMain()) |
| // Add the lambda twice (JVM just picks the first). |
| .addProgramClassFileData(getTransformedLambda()) |
| .addProgramClassFileData(getTransformedLambda()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| } |
| |
| @Test |
| public void testD8() throws Exception { |
| // Merging legacy lambdas is only valid for DEX inputs, thus also not R8 applicable. |
| assumeTrue(parameters.isDexRuntime()); |
| D8TestCompileResult lambda = |
| testForD8() |
| .setMinApi(parameters.getApiLevel()) |
| .addProgramClassFileData(getTransformedLambda()) |
| .compile(); |
| testForD8() |
| .setMinApi(parameters.getApiLevel()) |
| .addProgramClassFileData(getTransformedMain()) |
| // Add the lambda twice. |
| .addProgramFiles(lambda.writeToZip()) |
| .addProgramFiles(lambda.writeToZip()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| } |
| |
| private ClassReference LAMBDA = |
| Reference.classFromDescriptor( |
| Reference.classFromClass(WillBeLambda.class) |
| .getDescriptor() |
| .replace("WillBeLambda", "-$$Lambda$XYZ")); |
| |
| private byte[] getTransformedLambda() throws Exception { |
| return transformer(WillBeLambda.class) |
| .setClassDescriptor(LAMBDA.getDescriptor()) |
| .setAccessFlags(AccessFlags::setSynthetic) |
| .transform(); |
| } |
| |
| private byte[] getTransformedMain() throws Exception { |
| return transformer(TestClass.class) |
| .transformMethodInsnInMethod( |
| "main", |
| new MethodInsnTransform() { |
| @Override |
| public void visitMethodInsn( |
| int opcode, |
| String owner, |
| String name, |
| String descriptor, |
| boolean isInterface, |
| MethodVisitor visitor) { |
| visitor.visitMethodInsn( |
| opcode, LAMBDA.getBinaryName(), name, descriptor, isInterface); |
| } |
| }) |
| .transformTypeInsnInMethod( |
| "main", |
| new TypeInsnTransform() { |
| @Override |
| public void visitTypeInsn(int opcode, String type, MethodVisitor visitor) { |
| visitor.visitTypeInsn(opcode, LAMBDA.getBinaryName()); |
| } |
| }) |
| .transform(); |
| } |
| |
| static class WillBeLambda { |
| public void foo() { |
| System.out.println("Hello, world"); |
| } |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| new WillBeLambda().foo(); |
| } |
| } |
| } |