| // 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 com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.utils.BooleanUtils; |
| import com.android.tools.r8.utils.StringUtils; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.stream.Stream; |
| import java.util.stream.StreamSupport; |
| import org.jetbrains.annotations.NotNull; |
| 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 IterableTest extends DesugaredLibraryTestBase { |
| |
| private final TestParameters parameters; |
| private final boolean shrinkDesugaredLibrary; |
| private static final String EXPECTED_OUTPUT = |
| StringUtils.lines("1", "2", "3", "4", "5", "Count: 4"); |
| |
| @Parameters(name = "{1}, shrinkDesugaredLibrary: {0}") |
| public static List<Object[]> data() { |
| return buildParameters( |
| BooleanUtils.values(), getTestParameters().withAllRuntimes().withAllApiLevels().build()); |
| } |
| |
| public IterableTest(boolean shrinkDesugaredLibrary, TestParameters parameters) { |
| this.shrinkDesugaredLibrary = shrinkDesugaredLibrary; |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testIterable() throws Exception { |
| if (parameters.isCfRuntime()) { |
| testForJvm() |
| .addInnerClasses(IterableTest.class) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutput(EXPECTED_OUTPUT); |
| return; |
| } |
| KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters); |
| testForD8() |
| .addInnerClasses(IterableTest.class) |
| .setMinApi(parameters.getApiLevel()) |
| .enableCoreLibraryDesugaring(parameters.getApiLevel(), keepRuleConsumer) |
| .compile() |
| .addDesugaredCoreLibraryRunClassPath( |
| this::buildDesugaredLibrary, |
| parameters.getApiLevel(), |
| keepRuleConsumer.get(), |
| shrinkDesugaredLibrary) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutput(EXPECTED_OUTPUT); |
| } |
| |
| static class Main { |
| |
| public static void main(String[] args) { |
| Iterable<Integer> iterable = new MyIterable<>(Arrays.asList(1, 2, 3, 4, 5)); |
| iterable.forEach(System.out::println); |
| Stream<Integer> stream = StreamSupport.stream(iterable.spliterator(), false); |
| System.out.println("Count: " + stream.filter(x -> x != 3).count()); |
| } |
| } |
| |
| static class MyIterable<E> implements Iterable<E> { |
| |
| private Collection<E> collection; |
| |
| public MyIterable(Collection<E> collection) { |
| this.collection = collection; |
| } |
| |
| @NotNull |
| @Override |
| public Iterator<E> iterator() { |
| return collection.iterator(); |
| } |
| } |
| } |