Java tutorial
// Copyright 2018 The Bazel Authors. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package com.google.devtools.build.android.desugar; import static com.google.common.truth.Truth.assertThat; import com.google.common.collect.ImmutableList; import com.google.devtools.build.android.desugar.io.CoreLibraryRewriter; import java.util.Collection; import java.util.Comparator; import java.util.LinkedHashMap; import java.util.Map; import java.util.concurrent.ConcurrentMap; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.JUnit4; import org.objectweb.asm.Opcodes; @RunWith(JUnit4.class) public class CoreLibrarySupportTest { @Test public void testIsRenamedCoreLibrary() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), null, ImmutableList.of("java/time/"), ImmutableList.of(), ImmutableList.of(), ImmutableList.of()); assertThat(support.isRenamedCoreLibrary("java/time/X")).isTrue(); assertThat(support.isRenamedCoreLibrary("java/time/y/X")).isTrue(); assertThat(support.isRenamedCoreLibrary("java/io/X")).isFalse(); assertThat(support.isRenamedCoreLibrary("java/io/X$$CC")).isTrue(); assertThat(support.isRenamedCoreLibrary("java/io/X$$Lambda$17")).isTrue(); assertThat(support.isRenamedCoreLibrary("com/google/X")).isFalse(); } @Test public void testIsRenamedCoreLibrary_prefixedLoader() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter("__/"), null, ImmutableList.of("java/time/"), ImmutableList.of(), ImmutableList.of(), ImmutableList.of()); assertThat(support.isRenamedCoreLibrary("__/java/time/X")).isTrue(); assertThat(support.isRenamedCoreLibrary("__/java/time/y/X")).isTrue(); assertThat(support.isRenamedCoreLibrary("__/java/io/X")).isFalse(); assertThat(support.isRenamedCoreLibrary("__/java/io/X$$CC")).isTrue(); assertThat(support.isRenamedCoreLibrary("__/java/io/X$$Lambda$17")).isTrue(); assertThat(support.isRenamedCoreLibrary("com/google/X")).isFalse(); } @Test public void testRenameCoreLibrary() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), null, ImmutableList.of(), ImmutableList.of(), ImmutableList.of(), ImmutableList.of()); assertThat(support.renameCoreLibrary("java/time/X")).isEqualTo("j$/time/X"); assertThat(support.renameCoreLibrary("com/google/X")).isEqualTo("com/google/X"); } @Test public void testRenameCoreLibrary_prefixedLoader() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter("__/"), null, ImmutableList.of(), ImmutableList.of(), ImmutableList.of(), ImmutableList.of()); assertThat(support.renameCoreLibrary("__/java/time/X")).isEqualTo("j$/time/X"); assertThat(support.renameCoreLibrary("com/google/X")).isEqualTo("com/google/X"); } @Test public void testMoveTarget() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter("__/"), null, ImmutableList.of("java/util/Helper"), ImmutableList.of(), ImmutableList.of("java/util/Existing#match -> java/util/Helper"), ImmutableList.of()); assertThat(support.getMoveTarget("__/java/util/Existing", "match")).isEqualTo("j$/util/Helper"); assertThat(support.getMoveTarget("java/util/Existing", "match")).isEqualTo("j$/util/Helper"); assertThat(support.getMoveTarget("__/java/util/Existing", "matchesnot")).isNull(); assertThat(support.getMoveTarget("__/java/util/ExistingOther", "match")).isNull(); } @Test public void testIsEmulatedCoreClassOrInterface() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of("java/util/concurrent/"), ImmutableList.of("java/util/Map"), ImmutableList.of(), ImmutableList.of()); assertThat(support.isEmulatedCoreClassOrInterface("java/util/Map")).isTrue(); assertThat(support.isEmulatedCoreClassOrInterface("java/util/Map$$Lambda$17")).isFalse(); assertThat(support.isEmulatedCoreClassOrInterface("java/util/Map$$CC")).isFalse(); assertThat(support.isEmulatedCoreClassOrInterface("java/util/HashMap")).isTrue(); assertThat(support.isEmulatedCoreClassOrInterface("java/util/concurrent/ConcurrentMap")).isFalse(); // false for renamed prefixes assertThat(support.isEmulatedCoreClassOrInterface("com/google/Map")).isFalse(); } @Test public void testGetCoreInterfaceRewritingTarget_emulatedDefaultMethod() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of(), ImmutableList.of("java/util/Collection"), ImmutableList.of(), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Collection", "removeIf", "(Ljava/util/function/Predicate;)Z", true)).isEqualTo(Collection.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEVIRTUAL, "java/util/ArrayList", "removeIf", "(Ljava/util/function/Predicate;)Z", false)).isEqualTo(Collection.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "com/google/HypotheticalListInterface", "removeIf", "(Ljava/util/function/Predicate;)Z", true)) .isNull(); } @Test public void testGetCoreInterfaceRewritingTarget_emulatedImplementationMoved() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of("java/util/Moved"), ImmutableList.of("java/util/Map"), ImmutableList.of("java/util/LinkedHashMap#forEach->java/util/Moved"), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Map", "forEach", "(Ljava/util/function/BiConsumer;)V", true)).isEqualTo(Map.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESPECIAL, "java/util/Map", "forEach", "(Ljava/util/function/BiConsumer;)V", true)).isEqualTo(Map.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEVIRTUAL, "java/util/LinkedHashMap", "forEach", "(Ljava/util/function/BiConsumer;)V", false)).isEqualTo(Map.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESPECIAL, "java/util/LinkedHashMap", "forEach", "(Ljava/util/function/BiConsumer;)V", false)).isEqualTo(LinkedHashMap.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESPECIAL, "java/util/HashMap", "forEach", "(Ljava/util/function/BiConsumer;)V", false)).isEqualTo(Map.class); } @Test public void testGetCoreInterfaceRewritingTarget_abstractMethod() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of(), ImmutableList.of("java/util/Collection"), ImmutableList.of(), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Collection", "size", "()I", true)).isNull(); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEVIRTUAL, "java/util/ArrayList", "size", "()I", false)).isNull(); } @Test public void testGetCoreInterfaceRewritingTarget_emulatedDefaultOverride() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of(), ImmutableList.of("java/util/Map"), ImmutableList.of(), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Map", "putIfAbsent", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true)).isEqualTo(Map.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/concurrent/ConcurrentMap", "putIfAbsent", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true)).isNull(); // putIfAbsent is default in Map but abstract in ConcurrentMap assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/concurrent/ConcurrentMap", "getOrDefault", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true)).isEqualTo(ConcurrentMap.class); // conversely, getOrDefault is overridden as default method } @Test public void testGetCoreInterfaceRewritingTarget_staticInterfaceMethod() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of(), ImmutableList.of("java/util/Comparator"), ImmutableList.of(), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESTATIC, "java/util/Comparator", "reverseOrder", "()Ljava/util/Comparator;", true)).isEqualTo(Comparator.class); } /** * Tests that call sites of renamed core libraries are treated like call sites in regular * {@link InterfaceDesugaring}. */ @Test public void testGetCoreInterfaceRewritingTarget_renamed() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of("java/util/"), ImmutableList.of(), ImmutableList.of(), ImmutableList.of()); // regular invocations of default methods: ignored assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Collection", "removeIf", "(Ljava/util/function/Predicate;)Z", true)).isNull(); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEVIRTUAL, "java/util/ArrayList", "removeIf", "(Ljava/util/function/Predicate;)Z", false)).isNull(); // abstract methods: ignored assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Collection", "size", "()I", true)).isNull(); // static interface method assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESTATIC, "java/util/Comparator", "reverseOrder", "()Ljava/util/Comparator;", true)).isEqualTo(Comparator.class); // invokespecial for default methods: find nearest definition assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESPECIAL, "java/util/List", "removeIf", "(Ljava/util/function/Predicate;)Z", true)).isEqualTo(Collection.class); // invokespecial on a class: ignore (even if there's an inherited default method) assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "removeIf", "(Ljava/util/function/Predicate;)Z", false)).isNull(); } @Test public void testGetCoreInterfaceRewritingTarget_ignoreRenamedInvokeInterface() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of("java/util/concurrent/"), // should return null for these ImmutableList.of("java/util/Map"), ImmutableList.of(), ImmutableList.of()); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/Map", "getOrDefault", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true)).isEqualTo(Map.class); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/concurrent/ConcurrentMap", "getOrDefault", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true)).isNull(); } @Test public void testGetCoreInterfaceRewritingTarget_excludedMethodIgnored() throws Exception { CoreLibrarySupport support = new CoreLibrarySupport(new CoreLibraryRewriter(""), Thread.currentThread().getContextClassLoader(), ImmutableList.of(), ImmutableList.of("java/util/Collection"), ImmutableList.of(), ImmutableList.of("java/util/Collection#removeIf")); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEINTERFACE, "java/util/List", "removeIf", "(Ljava/util/function/Predicate;)Z", true)).isNull(); assertThat(support.getCoreInterfaceRewritingTarget(Opcodes.INVOKEVIRTUAL, "java/util/ArrayList", "removeIf", "(Ljava/util/function/Predicate;)Z", false)).isNull(); } @Test public void testEmulatedMethod_nullExceptions() throws Exception { CoreLibrarySupport.EmulatedMethod m = CoreLibrarySupport.EmulatedMethod.create(1, Number.class, "a", "()V", null); assertThat(m.access()).isEqualTo(1); assertThat(m.owner()).isEqualTo(Number.class); assertThat(m.name()).isEqualTo("a"); assertThat(m.descriptor()).isEqualTo("()V"); assertThat(m.exceptions()).isEmpty(); } @Test public void testEmulatedMethod_givenExceptions() throws Exception { CoreLibrarySupport.EmulatedMethod m = CoreLibrarySupport.EmulatedMethod.create(1, Number.class, "a", "()V", new String[] { "b", "c" }); assertThat(m.access()).isEqualTo(1); assertThat(m.owner()).isEqualTo(Number.class); assertThat(m.name()).isEqualTo("a"); assertThat(m.descriptor()).isEqualTo("()V"); assertThat(m.exceptions()).containsExactly("b", "c").inOrder(); } }