guava
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1/*
2* Copyright (C) 2010 The Guava Authors
3*
4* Licensed under the Apache License, Version 2.0 (the "License");
5* you may not use this file except in compliance with the License.
6* You may obtain a copy of the License at
7*
8* http://www.apache.org/licenses/LICENSE-2.0
9*
10* Unless required by applicable law or agreed to in writing, software
11* distributed under the License is distributed on an "AS IS" BASIS,
12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13* See the License for the specific language governing permissions and
14* limitations under the License.
15*/
16
17package com.google.common.collect.testing;
18
19import static com.google.common.collect.testing.features.CollectionFeature.DESCENDING_VIEW;
20import static com.google.common.collect.testing.features.CollectionFeature.SUBSET_VIEW;
21
22import com.google.common.annotations.GwtIncompatible;
23import com.google.common.collect.testing.DerivedCollectionGenerators.Bound;
24import com.google.common.collect.testing.DerivedCollectionGenerators.SortedSetSubsetTestSetGenerator;
25import com.google.common.collect.testing.features.Feature;
26import com.google.common.collect.testing.testers.NavigableSetNavigationTester;
27import java.util.ArrayList;
28import java.util.Collection;
29import java.util.Collections;
30import java.util.List;
31import java.util.NavigableSet;
32import java.util.Set;
33import java.util.SortedSet;
34import junit.framework.TestSuite;
35
36/**
37* Creates, based on your criteria, a JUnit test suite that exhaustively tests a NavigableSet
38* implementation.
39*/
40@GwtIncompatible
41public final class NavigableSetTestSuiteBuilder<E> extends SortedSetTestSuiteBuilder<E> {
42public static <E> NavigableSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
43NavigableSetTestSuiteBuilder<E> builder = new NavigableSetTestSuiteBuilder<>();
44builder.usingGenerator(generator);
45return builder;
46}
47
48@Override
49protected List<TestSuite> createDerivedSuites(
50FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>>
51parentBuilder) {
52List<TestSuite> derivedSuites = new ArrayList<>(super.createDerivedSuites(parentBuilder));
53
54if (!parentBuilder.getFeatures().contains(SUBSET_VIEW)) {
55// Other combinations are inherited from SortedSetTestSuiteBuilder.
56derivedSuites.add(createSubsetSuite(parentBuilder, Bound.NO_BOUND, Bound.INCLUSIVE));
57derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.NO_BOUND));
58derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.EXCLUSIVE));
59derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.INCLUSIVE));
60derivedSuites.add(createSubsetSuite(parentBuilder, Bound.INCLUSIVE, Bound.INCLUSIVE));
61}
62if (!parentBuilder.getFeatures().contains(DESCENDING_VIEW)) {
63derivedSuites.add(createDescendingSuite(parentBuilder));
64}
65return derivedSuites;
66}
67
68public static final class NavigableSetSubsetTestSetGenerator<E>
69extends SortedSetSubsetTestSetGenerator<E> {
70public NavigableSetSubsetTestSetGenerator(
71TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
72super(delegate, to, from);
73}
74
75@Override
76NavigableSet<E> createSubSet(SortedSet<E> sortedSet, E firstExclusive, E lastExclusive) {
77NavigableSet<E> set = (NavigableSet<E>) sortedSet;
78if (from == Bound.NO_BOUND && to == Bound.INCLUSIVE) {
79return set.headSet(lastInclusive, true);
80} else if (from == Bound.EXCLUSIVE && to == Bound.NO_BOUND) {
81return set.tailSet(firstExclusive, false);
82} else if (from == Bound.EXCLUSIVE && to == Bound.EXCLUSIVE) {
83return set.subSet(firstExclusive, false, lastExclusive, false);
84} else if (from == Bound.EXCLUSIVE && to == Bound.INCLUSIVE) {
85return set.subSet(firstExclusive, false, lastInclusive, true);
86} else if (from == Bound.INCLUSIVE && to == Bound.INCLUSIVE) {
87return set.subSet(firstInclusive, true, lastInclusive, true);
88} else {
89return (NavigableSet<E>) super.createSubSet(set, firstExclusive, lastExclusive);
90}
91}
92}
93
94@Override
95public NavigableSetTestSuiteBuilder<E> newBuilderUsing(
96TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
97return using(new NavigableSetSubsetTestSetGenerator<E>(delegate, to, from));
98}
99
100/** Create a suite whose maps are descending views of other maps. */
101private TestSuite createDescendingSuite(
102FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>>
103parentBuilder) {
104TestSetGenerator<E> delegate =
105(TestSetGenerator<E>) parentBuilder.getSubjectGenerator().getInnerGenerator();
106
107List<Feature<?>> features = new ArrayList<>();
108features.add(DESCENDING_VIEW);
109features.addAll(parentBuilder.getFeatures());
110
111return NavigableSetTestSuiteBuilder.using(
112new TestSetGenerator<E>() {
113
114@Override
115public SampleElements<E> samples() {
116return delegate.samples();
117}
118
119@Override
120public E[] createArray(int length) {
121return delegate.createArray(length);
122}
123
124@Override
125public Iterable<E> order(List<E> insertionOrder) {
126List<E> list = new ArrayList<>();
127for (E e : delegate.order(insertionOrder)) {
128list.add(e);
129}
130Collections.reverse(list);
131return list;
132}
133
134@Override
135public Set<E> create(Object... elements) {
136NavigableSet<E> navigableSet = (NavigableSet<E>) delegate.create(elements);
137return navigableSet.descendingSet();
138}
139})
140.named(parentBuilder.getName() + " descending")
141.withFeatures(features)
142.suppressing(parentBuilder.getSuppressedTests())
143.createTestSuite();
144}
145
146@SuppressWarnings("rawtypes") // class literals
147@Override
148protected List<Class<? extends AbstractTester>> getTesters() {
149List<Class<? extends AbstractTester>> testers = Helpers.copyToList(super.getTesters());
150testers.add(NavigableSetNavigationTester.class);
151return testers;
152}
153}
154