001/*
002 * Copyright (C) 2016 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.google;
018
019import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.annotations.GwtIncompatible;
023import com.google.common.annotations.J2ktIncompatible;
024import com.google.common.collect.Multiset.Entry;
025import com.google.common.collect.Multisets;
026import com.google.common.collect.testing.Helpers;
027import com.google.common.collect.testing.features.CollectionFeature;
028import java.lang.reflect.Method;
029import java.util.ArrayList;
030import java.util.Arrays;
031import java.util.Collections;
032import java.util.List;
033import org.junit.Ignore;
034
035/**
036 * Tests for {@code Multiset#forEachEntry}.
037 *
038 * @author Louis Wasserman
039 */
040@GwtCompatible(emulated = true)
041@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
042public class MultisetForEachEntryTester<E> extends AbstractMultisetTester<E> {
043  public void testForEachEntry() {
044    List<Entry<E>> expected = new ArrayList<>(getMultiset().entrySet());
045    List<Entry<E>> actual = new ArrayList<>();
046    getMultiset()
047        .forEachEntry((element, count) -> actual.add(Multisets.immutableEntry(element, count)));
048    Helpers.assertEqualIgnoringOrder(expected, actual);
049  }
050
051  @CollectionFeature.Require(KNOWN_ORDER)
052  public void testForEachEntryOrdered() {
053    List<Entry<E>> expected = new ArrayList<>(getMultiset().entrySet());
054    List<Entry<E>> actual = new ArrayList<>();
055    getMultiset()
056        .forEachEntry((element, count) -> actual.add(Multisets.immutableEntry(element, count)));
057    assertEquals(expected, actual);
058  }
059
060  public void testForEachEntryDuplicates() {
061    initThreeCopies();
062    List<Entry<E>> expected = Collections.singletonList(Multisets.immutableEntry(e0(), 3));
063    List<Entry<E>> actual = new ArrayList<>();
064    getMultiset()
065        .forEachEntry((element, count) -> actual.add(Multisets.immutableEntry(element, count)));
066    assertEquals(expected, actual);
067  }
068
069  /**
070   * Returns {@link Method} instances for the remove tests that assume multisets support duplicates
071   * so that the test of {@code Multisets.forSet()} can suppress them.
072   */
073  @J2ktIncompatible
074  @GwtIncompatible // reflection
075  public static List<Method> getForEachEntryDuplicateInitializingMethods() {
076    return Arrays.asList(
077        Helpers.getMethod(MultisetForEachEntryTester.class, "testForEachEntryDuplicates"));
078  }
079}