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
17package com.google.common.collect.testing.testers;
18
19import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
20import static com.google.common.collect.testing.features.CollectionFeature.REJECTS_DUPLICATES_AT_CREATION;
21import static com.google.common.collect.testing.features.CollectionSize.ONE;
22import static com.google.common.collect.testing.features.CollectionSize.ZERO;
23
24import com.google.common.collect.testing.features.CollectionFeature;
25import com.google.common.collect.testing.features.CollectionSize;
26
27import java.util.Arrays;
28import java.util.List;
29
30/**
31 * A generic JUnit test which tests creation (typically through a constructor or
32 * static factory method) of a set. Can't be invoked directly; please see
33 * {@link com.google.common.collect.testing.SetTestSuiteBuilder}.
34 *
35 * <p>This class is GWT compatible.
36 *
37 * @author Chris Povirk
38 */
39public class SetCreationTester<E> extends AbstractSetTester<E> {
40  @CollectionFeature.Require(value = ALLOWS_NULL_VALUES,
41      absent = REJECTS_DUPLICATES_AT_CREATION)
42  @CollectionSize.Require(absent = {ZERO, ONE})
43  public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
44    E[] array = createArrayWithNullElement();
45    array[0] = null;
46    collection = getSubjectGenerator().create(array);
47
48    List<E> expectedWithDuplicateRemoved =
49        Arrays.asList(array).subList(1, getNumElements());
50    expectContents(expectedWithDuplicateRemoved);
51  }
52
53  @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
54  @CollectionSize.Require(absent = {ZERO, ONE})
55  public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
56    E[] array = createSamplesArray();
57    array[1] = samples.e0;
58    collection = getSubjectGenerator().create(array);
59
60    List<E> expectedWithDuplicateRemoved =
61        Arrays.asList(array).subList(1, getNumElements());
62    expectContents(expectedWithDuplicateRemoved);
63  }
64
65  @CollectionFeature.Require(
66      {ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
67  @CollectionSize.Require(absent = {ZERO, ONE})
68  public void testCreateWithDuplicates_nullDuplicatesRejected() {
69    E[] array = createArrayWithNullElement();
70    array[0] = null;
71    try {
72      collection = getSubjectGenerator().create(array);
73      fail("Should reject duplicate null elements at creation");
74    } catch (IllegalArgumentException expected) {
75    }
76  }
77
78  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
79  @CollectionSize.Require(absent = {ZERO, ONE})
80  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
81    E[] array = createSamplesArray();
82    array[1] = samples.e0;
83    try {
84      collection = getSubjectGenerator().create(array);
85      fail("Should reject duplicate non-null elements at creation");
86    } catch (IllegalArgumentException expected) {
87    }
88  }
89}
90