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_VALUE_QUERIES;
022import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
023
024import com.google.common.annotations.GwtCompatible;
025import com.google.common.collect.testing.AbstractMapTester;
026import com.google.common.collect.testing.features.CollectionSize;
027import com.google.common.collect.testing.features.MapFeature;
028import java.util.Map;
029import org.junit.Ignore;
030
031/**
032 * Tester for {@link Map#remove(Object, Object)}. Can't be invoked directly; please see {@link
033 * com.google.common.collect.testing.MapTestSuiteBuilder}.
034 *
035 * @author Louis Wasserman
036 */
037@GwtCompatible
038@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
039public class MapRemoveEntryTester<K, V> extends AbstractMapTester<K, V> {
040  @MapFeature.Require(SUPPORTS_REMOVE)
041  @CollectionSize.Require(absent = ZERO)
042  public void testRemove_supportedPresent() {
043    assertTrue(getMap().remove(k0(), v0()));
044    expectMissing(e0());
045  }
046
047  @MapFeature.Require(SUPPORTS_REMOVE)
048  public void testRemove_supportedPresentKeyWrongValue() {
049    assertFalse(getMap().remove(k0(), v3()));
050    expectUnchanged();
051  }
052
053  @MapFeature.Require(SUPPORTS_REMOVE)
054  public void testRemove_supportedWrongKeyPresentValue() {
055    assertFalse(getMap().remove(k3(), v0()));
056    expectUnchanged();
057  }
058
059  @MapFeature.Require(SUPPORTS_REMOVE)
060  public void testRemove_supportedAbsentKeyAbsentValue() {
061    assertFalse(getMap().remove(k3(), v3()));
062    expectUnchanged();
063  }
064
065  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_KEY_QUERIES)
066  public void testRemove_nullKeyQueriesUnsupported() {
067    try {
068      assertFalse(getMap().remove(null, v3()));
069    } catch (NullPointerException tolerated) {
070      // since the operation would be a no-op, the exception is not required
071    }
072    expectUnchanged();
073  }
074
075  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)
076  public void testRemove_nullValueQueriesUnsupported() {
077    try {
078      assertFalse(getMap().remove(k3(), null));
079    } catch (NullPointerException tolerated) {
080      // since the operation would be a no-op, the exception is not required
081    }
082    expectUnchanged();
083  }
084
085  @MapFeature.Require(absent = SUPPORTS_REMOVE)
086  @CollectionSize.Require(absent = ZERO)
087  public void testRemove_unsupportedPresent() {
088    try {
089      getMap().remove(k0(), v0());
090      fail("Expected UnsupportedOperationException");
091    } catch (UnsupportedOperationException expected) {
092    }
093    expectUnchanged();
094  }
095
096  @MapFeature.Require(absent = SUPPORTS_REMOVE)
097  public void testRemove_unsupportedAbsent() {
098    try {
099      assertFalse(getMap().remove(k0(), v3()));
100    } catch (UnsupportedOperationException tolerated) {
101      // since the operation would be a no-op, the exception is not required
102    }
103    expectUnchanged();
104  }
105}