| // 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.graph; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import com.android.tools.r8.DesugarGraphConsumer; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.ToolHelper; |
| import com.android.tools.r8.origin.Origin; |
| import com.android.tools.r8.utils.AndroidApiLevel; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| 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 InterfaceToImplementingClassDependencyTest extends TestBase { |
| |
| // The simplest program that gives rise to a dependency edge in the graph is an interface with |
| // an implementing class. In this case, changes to the interface could require re-dexing the |
| // implementing class despite no derived changes happing to the classfile for the implementing |
| // class. |
| // |
| // For example, adding default method I.foo will trigger javac compilation of I and A to I.class |
| // and A.class, here I.class will have changed, but A.class is unchanged, thus only I.class will |
| // be compiled to dex if nothing informs about the desugaring dependency. That is incorrect, |
| // since A.dex needs to contain the desugared code for calling the default method. |
| // |
| // Note: the dependency of I for the compilation of A exists even when no default methods do. |
| |
| public interface I { |
| // Emtpy. |
| } |
| |
| public class A implements I { |
| // Empty. |
| } |
| |
| public static class TestClass { |
| |
| public static void main(String[] args) { |
| System.out.println("Hello World!"); |
| } |
| } |
| |
| // Test runner follows. |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().withAllApiLevels().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public InterfaceToImplementingClassDependencyTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| if (parameters.isCfRuntime()) { |
| testForJvm() |
| .addProgramClasses(I.class, A.class, TestClass.class) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello World!"); |
| } else { |
| MyDesugarGraphConsumer consumer = new MyDesugarGraphConsumer(); |
| Origin originI = makeOrigin("I"); |
| Origin originA = makeOrigin("A"); |
| testForD8() |
| .setMinApi(parameters.getApiLevel()) |
| .addProgramClasses(TestClass.class) |
| .apply( |
| b -> |
| b.getBuilder() |
| .setDesugarGraphConsumer(consumer) |
| .addClassProgramData(ToolHelper.getClassAsBytes(I.class), originI) |
| .addClassProgramData(ToolHelper.getClassAsBytes(A.class), originA)) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello World!"); |
| // If API level indicates desugaring is needed check the edges are reported. |
| if (parameters.getApiLevel().getLevel() < AndroidApiLevel.N.getLevel()) { |
| assertEquals(1, consumer.edges.size()); |
| assertEquals(originI, consumer.edges.keySet().iterator().next()); |
| assertEquals(originA, consumer.edges.values().iterator().next().iterator().next()); |
| } else { |
| assertEquals(0, consumer.edges.size()); |
| } |
| } |
| } |
| |
| private Origin makeOrigin(String name) { |
| return new Origin(Origin.root()) { |
| @Override |
| public String part() { |
| return name; |
| } |
| }; |
| } |
| |
| public static class MyDesugarGraphConsumer implements DesugarGraphConsumer { |
| |
| Map<Origin, Set<Origin>> edges = new HashMap<>(); |
| |
| @Override |
| public synchronized void accept(Origin src, Origin dst) { |
| edges.computeIfAbsent(src, s -> new HashSet<>()).add(dst); |
| } |
| } |
| } |