|
| 1 | +/* |
| 2 | + * Copyright (C) 2026 The Guava Authors |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | + |
| 17 | +package com.google.common.collect.testing; |
| 18 | + |
| 19 | +import com.google.common.collect.ForwardingConcurrentMap; |
| 20 | +import com.google.common.collect.testing.features.CollectionFeature; |
| 21 | +import com.google.common.collect.testing.features.CollectionSize; |
| 22 | +import com.google.common.collect.testing.features.MapFeature; |
| 23 | +import java.util.AbstractSet; |
| 24 | +import java.util.ArrayList; |
| 25 | +import java.util.Iterator; |
| 26 | +import java.util.List; |
| 27 | +import java.util.Map; |
| 28 | +import java.util.Map.Entry; |
| 29 | +import java.util.Set; |
| 30 | +import java.util.Spliterator; |
| 31 | +import java.util.Spliterators; |
| 32 | +import java.util.concurrent.ConcurrentHashMap; |
| 33 | +import java.util.concurrent.ConcurrentMap; |
| 34 | +import junit.framework.Test; |
| 35 | +import junit.framework.TestCase; |
| 36 | +import junit.framework.TestFailure; |
| 37 | +import junit.framework.TestResult; |
| 38 | + |
| 39 | +/** Tests for {@link ConcurrentMapTestSuiteBuilder}. */ |
| 40 | +@AndroidIncompatible // test-suite builders |
| 41 | +public final class ConcurrentMapTestSuiteBuilderTest extends TestCase { |
| 42 | + public void testConcurrentHashMapDerivedSetSpliteratorsPass() { |
| 43 | + TestResult result = runSuite(new ConcurrentHashMapGenerator(), "ConcurrentHashMap"); |
| 44 | + |
| 45 | + assertEquals(0, result.errorCount()); |
| 46 | + assertEquals(0, result.failureCount()); |
| 47 | + } |
| 48 | + |
| 49 | + public void testConcurrentMapDerivedSetSpliteratorTestsCatchWrongCharacteristics() { |
| 50 | + TestResult result = runSuite(new BadSpliteratorConcurrentMapGenerator(), "BadConcurrentMap"); |
| 51 | + |
| 52 | + assertEquals(0, result.errorCount()); |
| 53 | + |
| 54 | + List<String> failedTests = failedTests(result); |
| 55 | + assertTrue(failedTests.toString(), failedTests.size() >= 4); |
| 56 | + assertContainsFailure( |
| 57 | + failedTests, "testKeySetSpliteratorHasConcurrentCharacteristic"); |
| 58 | + assertContainsFailure( |
| 59 | + failedTests, "testKeySetSpliteratorDoesNotHaveSizedCharacteristic"); |
| 60 | + assertContainsFailure( |
| 61 | + failedTests, "testEntrySetSpliteratorHasConcurrentCharacteristic"); |
| 62 | + assertContainsFailure( |
| 63 | + failedTests, "testEntrySetSpliteratorDoesNotHaveSizedCharacteristic"); |
| 64 | + } |
| 65 | + |
| 66 | + private static TestResult runSuite(TestStringMapGenerator generator, String name) { |
| 67 | + Test suite = |
| 68 | + ConcurrentMapTestSuiteBuilder.using(generator) |
| 69 | + .named(name) |
| 70 | + .withFeatures( |
| 71 | + MapFeature.GENERAL_PURPOSE, |
| 72 | + CollectionFeature.SUPPORTS_ITERATOR_REMOVE, |
| 73 | + CollectionSize.ONE) |
| 74 | + .suppressing(new OpenJdk6MapTests().suppressForConcurrentHashMap()) |
| 75 | + .createTestSuite(); |
| 76 | + TestResult result = new TestResult(); |
| 77 | + suite.run(result); |
| 78 | + return result; |
| 79 | + } |
| 80 | + |
| 81 | + private static List<String> failedTests(TestResult result) { |
| 82 | + List<String> failedTests = new ArrayList<>(); |
| 83 | + for (java.util.Enumeration<TestFailure> failures = result.failures(); |
| 84 | + failures.hasMoreElements(); ) { |
| 85 | + failedTests.add(failures.nextElement().failedTest().toString()); |
| 86 | + } |
| 87 | + return failedTests; |
| 88 | + } |
| 89 | + |
| 90 | + private static void assertContainsFailure(List<String> failedTests, String testName) { |
| 91 | + for (String failedTest : failedTests) { |
| 92 | + if (failedTest.contains(testName)) { |
| 93 | + return; |
| 94 | + } |
| 95 | + } |
| 96 | + fail("Expected failure for " + testName + " in " + failedTests); |
| 97 | + } |
| 98 | + |
| 99 | + private static final class ConcurrentHashMapGenerator extends TestStringMapGenerator { |
| 100 | + @Override |
| 101 | + protected Map<String, String> create(Entry<String, String>[] entries) { |
| 102 | + ConcurrentMap<String, String> map = new ConcurrentHashMap<>(); |
| 103 | + for (Entry<String, String> entry : entries) { |
| 104 | + map.put(entry.getKey(), entry.getValue()); |
| 105 | + } |
| 106 | + return map; |
| 107 | + } |
| 108 | + } |
| 109 | + |
| 110 | + private static final class BadSpliteratorConcurrentMapGenerator extends TestStringMapGenerator { |
| 111 | + @Override |
| 112 | + protected Map<String, String> create(Entry<String, String>[] entries) { |
| 113 | + BadSpliteratorConcurrentMap map = new BadSpliteratorConcurrentMap(); |
| 114 | + for (Entry<String, String> entry : entries) { |
| 115 | + map.put(entry.getKey(), entry.getValue()); |
| 116 | + } |
| 117 | + return map; |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + private static final class BadSpliteratorConcurrentMap |
| 122 | + extends ForwardingConcurrentMap<String, String> { |
| 123 | + private final ConcurrentMap<String, String> delegate = new ConcurrentHashMap<>(); |
| 124 | + |
| 125 | + @Override |
| 126 | + protected ConcurrentMap<String, String> delegate() { |
| 127 | + return delegate; |
| 128 | + } |
| 129 | + |
| 130 | + @Override |
| 131 | + public Set<String> keySet() { |
| 132 | + return new BadSpliteratorSet<>(delegate.keySet()); |
| 133 | + } |
| 134 | + |
| 135 | + @Override |
| 136 | + public Set<Entry<String, String>> entrySet() { |
| 137 | + return new BadSpliteratorSet<>(delegate.entrySet()); |
| 138 | + } |
| 139 | + } |
| 140 | + |
| 141 | + private static final class BadSpliteratorSet<E> extends AbstractSet<E> { |
| 142 | + private final Set<E> delegate; |
| 143 | + |
| 144 | + BadSpliteratorSet(Set<E> delegate) { |
| 145 | + this.delegate = delegate; |
| 146 | + } |
| 147 | + |
| 148 | + @Override |
| 149 | + public Iterator<E> iterator() { |
| 150 | + return delegate.iterator(); |
| 151 | + } |
| 152 | + |
| 153 | + @Override |
| 154 | + public int size() { |
| 155 | + return delegate.size(); |
| 156 | + } |
| 157 | + |
| 158 | + @Override |
| 159 | + public boolean contains(Object o) { |
| 160 | + return delegate.contains(o); |
| 161 | + } |
| 162 | + |
| 163 | + @Override |
| 164 | + public boolean remove(Object o) { |
| 165 | + return delegate.remove(o); |
| 166 | + } |
| 167 | + |
| 168 | + @Override |
| 169 | + public void clear() { |
| 170 | + delegate.clear(); |
| 171 | + } |
| 172 | + |
| 173 | + @Override |
| 174 | + public Spliterator<E> spliterator() { |
| 175 | + return Spliterators.spliterator(iterator(), size(), Spliterator.DISTINCT); |
| 176 | + } |
| 177 | + } |
| 178 | +} |
0 commit comments