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.CollectionFeature.ALLOWS_NULL_VALUES;
018import static com.google.common.collect.testing.features.CollectionSize.ZERO;
019
020import com.google.common.annotations.GwtCompatible;
021import com.google.common.collect.testing.features.CollectionFeature;
022import com.google.common.collect.testing.features.CollectionSize;
023import com.google.common.testing.EqualsTester;
024import org.junit.Ignore;
025
026/**
027 * Tests for {@code Multiset.equals} and {@code Multiset.hashCode}.
028 *
029 * @author Louis Wasserman
030 */
031@GwtCompatible
032@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
033@SuppressWarnings("JUnit4ClassUsedInJUnit3")
034public class MultisetEqualsTester<E> extends AbstractMultisetTester<E> {
035  public void testEqualsSameContents() {
036    new EqualsTester()
037        .addEqualityGroup(
038            getMultiset(), getSubjectGenerator().create(getSampleElements().toArray()))
039        .testEquals();
040  }
041
042  @CollectionSize.Require(absent = ZERO)
043  public void testNotEqualsEmpty() {
044    new EqualsTester()
045        .addEqualityGroup(getMultiset())
046        .addEqualityGroup(getSubjectGenerator().create())
047        .testEquals();
048  }
049
050  public void testHashCodeMatchesEntrySet() {
051    assertEquals(getMultiset().entrySet().hashCode(), getMultiset().hashCode());
052  }
053
054  @CollectionSize.Require(absent = ZERO)
055  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
056  public void testEqualsMultisetWithNullValue() {
057    new EqualsTester()
058        .addEqualityGroup(getMultiset())
059        .addEqualityGroup(
060            getSubjectGenerator().create(createArrayWithNullElement()),
061            getSubjectGenerator().create(createArrayWithNullElement()))
062        .testEquals();
063  }
064}