1 /*
2  * Copyright (C) 2008 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 
17 package com.google.common.collect.testing;
18 
19 import com.google.common.collect.testing.features.CollectionFeature;
20 import com.google.common.collect.testing.features.Feature;
21 import com.google.common.testing.SerializableTester;
22 
23 import junit.framework.TestSuite;
24 
25 import java.util.ArrayList;
26 import java.util.Collection;
27 import java.util.HashSet;
28 import java.util.List;
29 import java.util.Set;
30 
31 /**
32  * Concrete instantiation of {@link AbstractCollectionTestSuiteBuilder} for
33  * testing collections that do not have a more specific tester like
34  * {@link ListTestSuiteBuilder} or {@link SetTestSuiteBuilder}.
35  *
36  * @author Chris Povirk
37  * @author Louis Wasserman
38  */
39 public class CollectionTestSuiteBuilder<E>
40     extends AbstractCollectionTestSuiteBuilder<
41         CollectionTestSuiteBuilder<E>, E> {
42   public static <E> CollectionTestSuiteBuilder<E> using(
43       TestCollectionGenerator<E> generator) {
44     return new CollectionTestSuiteBuilder<E>().usingGenerator(generator);
45   }
46 
47   @Override
48   protected
49       List<TestSuite>
50       createDerivedSuites(
51           FeatureSpecificTestSuiteBuilder<
52               ?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>> parentBuilder) {
53     List<TestSuite> derivedSuites = new ArrayList<TestSuite>(
54         super.createDerivedSuites(parentBuilder));
55 
56     if (parentBuilder.getFeatures().contains(CollectionFeature.SERIALIZABLE)) {
57       derivedSuites.add(CollectionTestSuiteBuilder
58           .using(new ReserializedCollectionGenerator<E>(parentBuilder.getSubjectGenerator()))
59           .named(getName() + " reserialized")
60           .withFeatures(computeReserializedCollectionFeatures(parentBuilder.getFeatures()))
61           .suppressing(parentBuilder.getSuppressedTests())
62           .createTestSuite());
63     }
64     return derivedSuites;
65   }
66 
67   static class ReserializedCollectionGenerator<E> implements TestCollectionGenerator<E> {
68     final OneSizeTestContainerGenerator<Collection<E>, E> gen;
69 
70     private ReserializedCollectionGenerator(OneSizeTestContainerGenerator<Collection<E>, E> gen) {
71       this.gen = gen;
72     }
73 
74     @Override
75     public SampleElements<E> samples() {
76       return gen.samples();
77     }
78 
79     @Override
80     public Collection<E> create(Object... elements) {
81       return SerializableTester.reserialize(gen.create(elements));
82     }
83 
84     @Override
85     public E[] createArray(int length) {
86       return gen.createArray(length);
87     }
88 
89     @Override
90     public Iterable<E> order(List<E> insertionOrder) {
91       return gen.order(insertionOrder);
92     }
93   }
94 
95   private static Set<Feature<?>> computeReserializedCollectionFeatures(Set<Feature<?>> features) {
96     Set<Feature<?>> derivedFeatures = new HashSet<Feature<?>>();
97     derivedFeatures.addAll(features);
98     derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
99     derivedFeatures.remove(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS);
100     return derivedFeatures;
101   }
102 }
103