001/*
002 * Copyright (C) 2011 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.IteratorFeature.MODIFIABLE;
018import static com.google.common.collect.testing.IteratorFeature.UNMODIFIABLE;
019import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
020import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE;
021
022import com.google.common.annotations.GwtCompatible;
023import com.google.common.annotations.GwtIncompatible;
024import com.google.common.collect.testing.Helpers;
025import com.google.common.collect.testing.IteratorTester;
026import com.google.common.collect.testing.features.CollectionFeature;
027import java.lang.reflect.Method;
028import java.util.Arrays;
029import java.util.Iterator;
030import java.util.List;
031import org.junit.Ignore;
032
033/**
034 * Tester to make sure the {@code iterator().remove()} implementation of {@code Multiset} works when
035 * there are multiple occurrences of elements.
036 *
037 * @author Louis Wasserman
038 */
039@GwtCompatible(emulated = true)
040@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041public class MultisetIteratorTester<E> extends AbstractMultisetTester<E> {
042  @SuppressWarnings("unchecked")
043  @CollectionFeature.Require({SUPPORTS_ITERATOR_REMOVE, KNOWN_ORDER})
044  public void testRemovingIteratorKnownOrder() {
045    new IteratorTester<E>(
046        4,
047        MODIFIABLE,
048        getSubjectGenerator().order(Arrays.asList(e0(), e1(), e1(), e2())),
049        IteratorTester.KnownOrder.KNOWN_ORDER) {
050      @Override
051      protected Iterator<E> newTargetIterator() {
052        return getSubjectGenerator().create(e0(), e1(), e1(), e2()).iterator();
053      }
054    }.test();
055  }
056
057  @SuppressWarnings("unchecked")
058  @CollectionFeature.Require(value = SUPPORTS_ITERATOR_REMOVE, absent = KNOWN_ORDER)
059  public void testRemovingIteratorUnknownOrder() {
060    new IteratorTester<E>(
061        4,
062        MODIFIABLE,
063        Arrays.asList(e0(), e1(), e1(), e2()),
064        IteratorTester.KnownOrder.UNKNOWN_ORDER) {
065      @Override
066      protected Iterator<E> newTargetIterator() {
067        return getSubjectGenerator().create(e0(), e1(), e1(), e2()).iterator();
068      }
069    }.test();
070  }
071
072  @SuppressWarnings("unchecked")
073  @CollectionFeature.Require(value = KNOWN_ORDER, absent = SUPPORTS_ITERATOR_REMOVE)
074  public void testIteratorKnownOrder() {
075    new IteratorTester<E>(
076        4,
077        UNMODIFIABLE,
078        getSubjectGenerator().order(Arrays.asList(e0(), e1(), e1(), e2())),
079        IteratorTester.KnownOrder.KNOWN_ORDER) {
080      @Override
081      protected Iterator<E> newTargetIterator() {
082        return getSubjectGenerator().create(e0(), e1(), e1(), e2()).iterator();
083      }
084    }.test();
085  }
086
087  @SuppressWarnings("unchecked")
088  @CollectionFeature.Require(absent = {SUPPORTS_ITERATOR_REMOVE, KNOWN_ORDER})
089  public void testIteratorUnknownOrder() {
090    new IteratorTester<E>(
091        4,
092        UNMODIFIABLE,
093        Arrays.asList(e0(), e1(), e1(), e2()),
094        IteratorTester.KnownOrder.UNKNOWN_ORDER) {
095      @Override
096      protected Iterator<E> newTargetIterator() {
097        return getSubjectGenerator().create(e0(), e1(), e1(), e2()).iterator();
098      }
099    }.test();
100  }
101
102  /**
103   * Returns {@link Method} instances for the tests that assume multisets support duplicates so that
104   * the test of {@code Multisets.forSet()} can suppress them.
105   */
106  @GwtIncompatible // reflection
107  public static List<Method> getIteratorDuplicateInitializingMethods() {
108    return Arrays.asList(
109        Helpers.getMethod(MultisetIteratorTester.class, "testIteratorKnownOrder"),
110        Helpers.getMethod(MultisetIteratorTester.class, "testIteratorUnknownOrder"),
111        Helpers.getMethod(MultisetIteratorTester.class, "testRemovingIteratorKnownOrder"),
112        Helpers.getMethod(MultisetIteratorTester.class, "testRemovingIteratorUnknownOrder"));
113  }
114}