001/*
002 * Copyright (C) 2013 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005 * in compliance with the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License
010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011 * or implied. See the License for the specific language governing permissions and limitations under
012 * the License.
013 */
014
015package com.google.common.collect.testing.google;
016
017import static com.google.common.collect.testing.features.CollectionSize.ZERO;
018import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
019import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.collect.Multimap;
023import com.google.common.collect.testing.Helpers;
024import com.google.common.collect.testing.features.CollectionSize;
025import com.google.common.collect.testing.features.MapFeature;
026import com.google.common.testing.EqualsTester;
027import java.util.ArrayList;
028import java.util.List;
029import java.util.Map.Entry;
030import org.junit.Ignore;
031
032/**
033 * Tester for {@code Multimap.equals}.
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 MultimapEqualsTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
040  public void testEqualsTrue() {
041    new EqualsTester()
042        .addEqualityGroup(multimap(), getSubjectGenerator().create(getSampleElements().toArray()))
043        .testEquals();
044  }
045
046  public void testEqualsFalse() {
047    List<Entry<K, V>> targetEntries = new ArrayList<>(getSampleElements());
048    targetEntries.add(Helpers.mapEntry(k0(), v3()));
049    new EqualsTester()
050        .addEqualityGroup(multimap())
051        .addEqualityGroup(getSubjectGenerator().create(targetEntries.toArray()))
052        .testEquals();
053  }
054
055  @CollectionSize.Require(absent = ZERO)
056  @MapFeature.Require(ALLOWS_NULL_KEYS)
057  public void testEqualsMultimapWithNullKey() {
058    Multimap<K, V> original = multimap();
059    initMultimapWithNullKey();
060    Multimap<K, V> withNull = multimap();
061    new EqualsTester()
062        .addEqualityGroup(original)
063        .addEqualityGroup(
064            withNull, getSubjectGenerator().create((Object[]) createArrayWithNullKey()))
065        .testEquals();
066  }
067
068  @CollectionSize.Require(absent = ZERO)
069  @MapFeature.Require(ALLOWS_NULL_VALUES)
070  public void testEqualsMultimapWithNullValue() {
071    Multimap<K, V> original = multimap();
072    initMultimapWithNullValue();
073    Multimap<K, V> withNull = multimap();
074    new EqualsTester()
075        .addEqualityGroup(original)
076        .addEqualityGroup(
077            withNull, getSubjectGenerator().create((Object[]) createArrayWithNullValue()))
078        .testEquals();
079  }
080
081  @CollectionSize.Require(absent = ZERO)
082  public void testNotEqualsEmpty() {
083    new EqualsTester()
084        .addEqualityGroup(multimap())
085        .addEqualityGroup(getSubjectGenerator().create())
086        .testEquals();
087  }
088
089  public void testHashCodeMatchesAsMap() {
090    assertEquals(multimap().asMap().hashCode(), multimap().hashCode());
091  }
092}