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.Map;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@link Map#replace(Object, Object)}. Can't be invoked directly;
034 * please see {@link com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
035 *
036 * @author Louis Wasserman
037 */
038@GwtCompatible
039@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
040public class MapReplaceTester<K, V> extends AbstractMapTester<K, V> {
041
042  @MapFeature.Require(SUPPORTS_PUT)
043  @CollectionSize.Require(absent = ZERO)
044  public void testReplace_supportedPresent() {
045    try {
046      assertEquals(v0(), getMap().replace(k0(), v3()));
047      expectReplacement(entry(k0(), v3()));
048    } catch (ClassCastException tolerated) { // for ClassToInstanceMap
049      expectUnchanged();
050    }
051  }
052
053  @MapFeature.Require(SUPPORTS_PUT)
054  @CollectionSize.Require(absent = ZERO)
055  public void testReplace_supportedPresentNoChange() {
056    assertEquals(v0(), getMap().replace(k0(), v0()));
057    expectUnchanged();
058  }
059
060  @MapFeature.Require(SUPPORTS_PUT)
061  public void testReplace_supportedAbsent() {
062    assertNull(getMap().replace(k3(), v3()));
063    expectUnchanged();
064  }
065
066  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
067  @CollectionSize.Require(absent = ZERO)
068  public void testReplace_presentNullValueUnsupported() {
069    try {
070      getMap().replace(k0(), null);
071      fail("Expected NullPointerException");
072    } catch (NullPointerException expected) {
073    }
074    expectUnchanged();
075  }
076
077  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
078  public void testReplace_absentNullValueUnsupported() {
079    try {
080      getMap().replace(k3(), null);
081    } catch (NullPointerException tolerated) {
082      // permitted not to throw because it would be a no-op
083    }
084    expectUnchanged();
085  }
086
087  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEY_QUERIES)
088  public void testReplace_absentNullKeyUnsupported() {
089    try {
090      getMap().replace(null, v3());
091    } catch (NullPointerException tolerated) {
092      // permitted not to throw because it would be a no-op
093    }
094    expectUnchanged();
095  }
096
097  @MapFeature.Require(absent = SUPPORTS_PUT)
098  @CollectionSize.Require(absent = ZERO)
099  public void testReplace_unsupportedPresent() {
100    try {
101      getMap().replace(k0(), v3());
102      fail("Expected UnsupportedOperationException");
103    } catch (UnsupportedOperationException expected) {
104    } catch (ClassCastException tolerated) {
105      // for ClassToInstanceMap
106    }
107
108    expectUnchanged();
109  }
110}