| // 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.ir.optimize.extrasubclasses; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import java.nio.file.Path; |
| 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 AbstractClassOnlyImplementedByMissingClassTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public AbstractClassOnlyImplementedByMissingClassTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| /** |
| * Tests that it is possible to provide an implementation of an abstract class after the program |
| * has been compiled with R8, as long as the abstract class and its methods have been kept. |
| */ |
| @Test |
| public void test() throws Exception { |
| Path r8Out = |
| testForR8(parameters.getBackend()) |
| // B is not visible to the R8 compilation. |
| .addProgramClasses(TestClass.class, A.class) |
| // Helper is added on the classpath such that R8 doesn't know what it does. |
| .addClasspathClasses(Helper.class) |
| .addKeepMainRule(TestClass.class) |
| // Keeping A, A.<init>(), and A.m() should make it possible to provide an implementation |
| // of |
| // A after the R8 compilation. |
| .addKeepRules("-keep class " + A.class.getTypeName() + " { void <init>(); void m(); }") |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .writeToZip(); |
| |
| testForRuntime(parameters) |
| .addProgramClasses(B.class, Helper.class) |
| .addRunClasspathFiles(r8Out) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello world!", "The end"); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| Helper.getInstance().m(); |
| System.out.println("The end"); |
| } |
| } |
| |
| abstract static class A { |
| |
| abstract void m(); |
| } |
| |
| // Only declarations are visible via the classpath. |
| static class Helper { |
| |
| static A getInstance() { |
| return new B(); |
| } |
| } |
| |
| // Not visible during the R8 compilation. |
| static class B extends A { |
| |
| @Override |
| public void m() { |
| System.out.println("Hello world!"); |
| } |
| } |
| } |