| // 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.desugaredlibrary; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static junit.framework.TestCase.assertEquals; |
| import static junit.framework.TestCase.assertTrue; |
| import static org.hamcrest.CoreMatchers.not; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.code.Instruction; |
| import com.android.tools.r8.graph.DexClass; |
| import com.android.tools.r8.graph.DexEncodedMethod; |
| import com.android.tools.r8.ir.desugar.InterfaceMethodRewriter; |
| import com.android.tools.r8.utils.BooleanUtils; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.FoundClassSubject; |
| import com.android.tools.r8.utils.codeinspector.InstructionSubject; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import org.junit.Assume; |
| 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 EmulatedInterfacesTest extends DesugaredLibraryTestBase { |
| |
| private final TestParameters parameters; |
| private final boolean shrinkDesugaredLibrary; |
| |
| @Parameters(name = "{1}, shrinkDesugaredLibrary: {0}") |
| public static List<Object[]> data() { |
| return buildParameters( |
| BooleanUtils.values(), getTestParameters().withDexRuntimes().withAllApiLevels().build()); |
| } |
| |
| public EmulatedInterfacesTest(boolean shrinkDesugaredLibrary, TestParameters parameters) { |
| this.shrinkDesugaredLibrary = shrinkDesugaredLibrary; |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testEmulatedInterface() throws Exception { |
| Assume.assumeTrue(requiresEmulatedInterfaceCoreLibDesugaring(parameters)); |
| CodeInspector inspector = |
| new CodeInspector( |
| buildDesugaredLibrary( |
| parameters.getApiLevel(), "-keep class **$-EL", shrinkDesugaredLibrary)); |
| assertEmulateInterfaceClassesPresentWithDispatchMethods(inspector); |
| assertCollectionMethodsPresentWithCorrectDispatch(inspector); |
| } |
| |
| private void assertEmulateInterfaceClassesPresentWithDispatchMethods(CodeInspector inspector) { |
| List<FoundClassSubject> emulatedInterfaces = getEmulatedInterfaces(inspector); |
| int numDispatchClasses = 9; |
| assertThat(inspector.clazz("j$.util.Map$Entry$-EL"), not(isPresent())); |
| assertEquals(numDispatchClasses, emulatedInterfaces.size()); |
| for (FoundClassSubject clazz : emulatedInterfaces) { |
| assertTrue( |
| clazz.allMethods().stream() |
| .allMatch( |
| method -> |
| method.isStatic() |
| && method |
| .streamInstructions() |
| .anyMatch(InstructionSubject::isInstanceOf))); |
| } |
| } |
| |
| private List<FoundClassSubject> getEmulatedInterfaces(CodeInspector inspector) { |
| return inspector.allClasses().stream() |
| .filter( |
| clazz -> |
| clazz |
| .getOriginalName() |
| .contains(InterfaceMethodRewriter.EMULATE_LIBRARY_CLASS_NAME_SUFFIX)) |
| .collect(Collectors.toList()); |
| } |
| |
| private void assertCollectionMethodsPresentWithCorrectDispatch(CodeInspector inspector) { |
| DexClass collectionDispatch = inspector.clazz("j$.util.Collection$-EL").getDexProgramClass(); |
| for (DexEncodedMethod method : collectionDispatch.methods()) { |
| int numCheckCast = |
| (int) |
| Stream.of(method.getCode().asDexCode().instructions) |
| .filter(Instruction::isCheckCast) |
| .count(); |
| if (method.qualifiedName().contains("spliterator")) { |
| assertEquals(5, numCheckCast); |
| } else { |
| assertEquals(1, numCheckCast); |
| } |
| } |
| } |
| } |