Java
113 строк · 4.0 Кб
1/*
2* Copyright (C) 2008 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
17package com.google.common.collect.testing.testers;18
19import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;20import static com.google.common.collect.testing.features.CollectionSize.ZERO;21import static com.google.common.collect.testing.features.MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION;22import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;23
24import com.google.common.annotations.GwtCompatible;25import com.google.common.collect.testing.AbstractMapTester;26import com.google.common.collect.testing.features.CollectionSize;27import com.google.common.collect.testing.features.MapFeature;28import java.util.ConcurrentModificationException;29import java.util.Iterator;30import java.util.Map.Entry;31import org.junit.Ignore;32
33/**
34* A generic JUnit test which tests {@code clear()} operations on a map. Can't be invoked directly;
35* please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
36*
37* @author George van den Driessche
38* @author Chris Povirk
39*/
40@GwtCompatible
41@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.42@SuppressWarnings("JUnit4ClassUsedInJUnit3")43public class MapClearTester<K, V> extends AbstractMapTester<K, V> {44@MapFeature.Require(SUPPORTS_REMOVE)45public void testClear() {46getMap().clear();47assertTrue("After clear(), a map should be empty.", getMap().isEmpty());48assertEquals(0, getMap().size());49assertFalse(getMap().entrySet().iterator().hasNext());50}51
52@MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})53@CollectionSize.Require(SEVERAL)54public void testClearConcurrentWithEntrySetIteration() {55try {56Iterator<Entry<K, V>> iterator = getMap().entrySet().iterator();57getMap().clear();58iterator.next();59fail("Expected ConcurrentModificationException");60} catch (ConcurrentModificationException expected) {61// success62}63}64
65@MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})66@CollectionSize.Require(SEVERAL)67public void testClearConcurrentWithKeySetIteration() {68try {69Iterator<K> iterator = getMap().keySet().iterator();70getMap().clear();71iterator.next();72fail("Expected ConcurrentModificationException");73} catch (ConcurrentModificationException expected) {74// success75}76}77
78@MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})79@CollectionSize.Require(SEVERAL)80public void testClearConcurrentWithValuesIteration() {81try {82Iterator<V> iterator = getMap().values().iterator();83getMap().clear();84iterator.next();85fail("Expected ConcurrentModificationException");86} catch (ConcurrentModificationException expected) {87// success88}89}90
91@MapFeature.Require(absent = SUPPORTS_REMOVE)92@CollectionSize.Require(absent = ZERO)93public void testClear_unsupported() {94try {95getMap().clear();96fail(97"clear() should throw UnsupportedOperation if a map does "98+ "not support it and is not empty.");99} catch (UnsupportedOperationException expected) {100}101expectUnchanged();102}103
104@MapFeature.Require(absent = SUPPORTS_REMOVE)105@CollectionSize.Require(ZERO)106public void testClear_unsupportedByEmptyCollection() {107try {108getMap().clear();109} catch (UnsupportedOperationException tolerated) {110}111expectUnchanged();112}113}
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