001/*
002 * Copyright (C) 2015 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionSize.ZERO;
020import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
023import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
024
025import com.google.common.annotations.GwtCompatible;
026import com.google.common.collect.testing.AbstractMapTester;
027import com.google.common.collect.testing.features.CollectionSize;
028import com.google.common.collect.testing.features.MapFeature;
029import java.util.concurrent.ConcurrentMap;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@code replace(K, V)} operations on a concurrent map. Can't be
034 * invoked directly; please see {@link
035 * com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
036 *
037 * @author Louis Wasserman
038 */
039@GwtCompatible
040@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041@SuppressWarnings("JUnit4ClassUsedInJUnit3")
042@ElementTypesAreNonnullByDefault
043public class ConcurrentMapReplaceTester<K, V> extends AbstractMapTester<K, V> {
044  @Override
045  protected ConcurrentMap<K, V> getMap() {
046    return (ConcurrentMap<K, V>) super.getMap();
047  }
048
049  @MapFeature.Require(SUPPORTS_PUT)
050  @CollectionSize.Require(absent = ZERO)
051  public void testReplace_supportedPresent() {
052    assertEquals(v0(), getMap().replace(k0(), v3()));
053    expectReplacement(entry(k0(), v3()));
054  }
055
056  @MapFeature.Require(SUPPORTS_PUT)
057  @CollectionSize.Require(absent = ZERO)
058  public void testReplace_supportedPresentNoChange() {
059    assertEquals(v0(), getMap().replace(k0(), v0()));
060    expectUnchanged();
061  }
062
063  @MapFeature.Require(SUPPORTS_PUT)
064  public void testReplace_supportedAbsent() {
065    assertNull(getMap().replace(k3(), v3()));
066    expectUnchanged();
067  }
068
069  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
070  @CollectionSize.Require(absent = ZERO)
071  public void testReplace_presentNullValueUnsupported() {
072    try {
073      getMap().replace(k0(), null);
074      fail("Expected NullPointerException");
075    } catch (NullPointerException expected) {
076    }
077    expectUnchanged();
078  }
079
080  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
081  public void testReplace_absentNullValueUnsupported() {
082    try {
083      getMap().replace(k3(), null);
084    } catch (NullPointerException tolerated) {
085      // permitted not to throw because it would be a no-op
086    }
087    expectUnchanged();
088  }
089
090  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEY_QUERIES)
091  public void testReplace_absentNullKeyUnsupported() {
092    try {
093      getMap().replace(null, v3());
094    } catch (NullPointerException tolerated) {
095      // permitted not to throw because it would be a no-op
096    }
097    expectUnchanged();
098  }
099
100  @MapFeature.Require(absent = SUPPORTS_PUT)
101  @CollectionSize.Require(absent = ZERO)
102  public void testReplace_unsupportedPresent() {
103    try {
104      getMap().replace(k0(), v3());
105      fail("Expected UnsupportedOperationException");
106    } catch (UnsupportedOperationException expected) {
107    }
108    expectUnchanged();
109  }
110}