1/*
2 * Copyright (C) 2011 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14
15package com.google.common.collect.testing.google;
16
17import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
18import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE;
19
20import com.google.common.annotations.GwtCompatible;
21import com.google.common.collect.testing.IteratorFeature;
22import com.google.common.collect.testing.IteratorTester;
23import com.google.common.collect.testing.features.CollectionFeature;
24
25import java.util.Arrays;
26import java.util.Iterator;
27
28/**
29 * Tester to make sure the {@code iterator().remove()} implementation of {@code Multiset} works when
30 * there are multiple occurrences of elements.
31 *
32 * @author Louis Wasserman
33 */
34@GwtCompatible(emulated = true)
35public class MultisetIteratorTester<E> extends AbstractMultisetTester<E> {
36  @SuppressWarnings("unchecked")
37  @CollectionFeature.Require({SUPPORTS_ITERATOR_REMOVE, KNOWN_ORDER})
38  public void testRemovingIteratorKnownOrder() {
39    new IteratorTester<E>(4, IteratorFeature.MODIFIABLE, getSubjectGenerator().order(
40        Arrays.asList(samples.e0, samples.e1, samples.e1, samples.e2)),
41        IteratorTester.KnownOrder.KNOWN_ORDER) {
42      @Override
43      protected Iterator<E> newTargetIterator() {
44        return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2)
45            .iterator();
46      }
47    }.test();
48  }
49
50  @SuppressWarnings("unchecked")
51  @CollectionFeature.Require(value = SUPPORTS_ITERATOR_REMOVE, absent = KNOWN_ORDER)
52  public void testRemovingIteratorUnknownOrder() {
53    new IteratorTester<E>(4, IteratorFeature.MODIFIABLE, Arrays.asList(samples.e0, samples.e1,
54        samples.e1, samples.e2), IteratorTester.KnownOrder.UNKNOWN_ORDER) {
55      @Override
56      protected Iterator<E> newTargetIterator() {
57        return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2)
58            .iterator();
59      }
60    }.test();
61  }
62
63  @SuppressWarnings("unchecked")
64  @CollectionFeature.Require(value = KNOWN_ORDER, absent = SUPPORTS_ITERATOR_REMOVE)
65  public void testIteratorKnownOrder() {
66    new IteratorTester<E>(4, IteratorFeature.UNMODIFIABLE, getSubjectGenerator().order(
67        Arrays.asList(samples.e0, samples.e1, samples.e1, samples.e2)),
68        IteratorTester.KnownOrder.KNOWN_ORDER) {
69      @Override
70      protected Iterator<E> newTargetIterator() {
71        return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2)
72            .iterator();
73      }
74    }.test();
75  }
76
77  @SuppressWarnings("unchecked")
78  @CollectionFeature.Require(absent = {SUPPORTS_ITERATOR_REMOVE, KNOWN_ORDER})
79  public void testIteratorUnknownOrder() {
80    new IteratorTester<E>(4, IteratorFeature.UNMODIFIABLE, Arrays.asList(samples.e0, samples.e1,
81        samples.e1, samples.e2), IteratorTester.KnownOrder.UNKNOWN_ORDER) {
82      @Override
83      protected Iterator<E> newTargetIterator() {
84        return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2)
85            .iterator();
86      }
87    }.test();
88  }
89}
90
91