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Fix #7855: testlib: add tests for ConcurrentMap to make sure its derived Sets are concurrent #8599
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72 changes: 72 additions & 0 deletions
...testlib/src/com/google/common/collect/testing/testers/ConcurrentMapSpliteratorTester.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Copyright (C) 2026 The Guava Authors | ||
| * | ||
| * 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.common.collect.testing.testers; | ||
|
|
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| import com.google.common.annotations.GwtIncompatible; | ||
| import com.google.common.collect.testing.AbstractMapTester; | ||
| import java.lang.reflect.Method; | ||
| import java.util.List; | ||
| import java.util.Spliterator; | ||
| import java.util.stream.Stream; | ||
|
|
||
| @GwtIncompatible | ||
| public class ConcurrentMapSpliteratorTester<K, V> extends AbstractMapTester<K, V> { | ||
|
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| public void testKeySetSpliterator() { | ||
| Spliterator<K> spliterator = getMap().keySet().spliterator(); | ||
| assertTrue( | ||
| "keySet spliterator should be CONCURRENT", | ||
| spliterator.hasCharacteristics(Spliterator.CONCURRENT)); | ||
| assertFalse( | ||
| "keySet spliterator should not be SIZED", | ||
| spliterator.hasCharacteristics(Spliterator.SIZED)); | ||
| testStreamToList(getMap().keySet().stream()); | ||
| } | ||
|
|
||
| public void testValuesSpliterator() { | ||
| Spliterator<V> spliterator = getMap().values().spliterator(); | ||
| assertTrue( | ||
| "values spliterator should be CONCURRENT", | ||
| spliterator.hasCharacteristics(Spliterator.CONCURRENT)); | ||
| assertFalse( | ||
| "values spliterator should not be SIZED", | ||
| spliterator.hasCharacteristics(Spliterator.SIZED)); | ||
| testStreamToList(getMap().values().stream()); | ||
| } | ||
|
|
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| public void testEntrySetSpliterator() { | ||
| Spliterator<java.util.Map.Entry<K, V>> spliterator = getMap().entrySet().spliterator(); | ||
| assertTrue( | ||
| "entrySet spliterator should be CONCURRENT", | ||
| spliterator.hasCharacteristics(Spliterator.CONCURRENT)); | ||
| assertFalse( | ||
| "entrySet spliterator should not be SIZED", | ||
| spliterator.hasCharacteristics(Spliterator.SIZED)); | ||
| testStreamToList(getMap().entrySet().stream()); | ||
| } | ||
|
|
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| private void testStreamToList(Stream<?> stream) { | ||
| try { | ||
| Method toList = Stream.class.getMethod("toList"); | ||
| List<?> list = (List<?>) toList.invoke(stream); | ||
| assertEquals(getNumElements(), list.size()); | ||
| } catch (NoSuchMethodException e) { | ||
| // Stream.toList() not available, just check toArray | ||
| assertEquals(getNumElements(), stream.toArray().length); | ||
| } catch (Exception e) { | ||
| fail("Stream.toList() threw exception: " + e.getCause()); | ||
| } | ||
| } | ||
| } |
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