SetCreationTester.java revision 3c77433663281544363151bf284b0240dfd22a42 
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.annotations.GwtCompatible;
25import com.google.common.collect.testing.features.CollectionFeature;
26import com.google.common.collect.testing.features.CollectionSize;
27
28import java.util.Arrays;
29import java.util.List;
30
31/**
32 * A generic JUnit test which tests creation (typically through a constructor or
33 * static factory method) of a set. Can't be invoked directly; please see
34 * {@link com.google.common.collect.testing.SetTestSuiteBuilder}.
35 *
36 * <p>This class is GWT compatible.
37 *
38 * @author Chris Povirk
39 */
40@GwtCompatible
41public class SetCreationTester<E> extends AbstractSetTester<E> {
42  @CollectionFeature.Require(value = ALLOWS_NULL_VALUES,
43      absent = REJECTS_DUPLICATES_AT_CREATION)
44  @CollectionSize.Require(absent = {ZERO, ONE})
45  public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
46    E[] array = createArrayWithNullElement();
47    array[0] = null;
48    collection = getSubjectGenerator().create(array);
49
50    List<E> expectedWithDuplicateRemoved =
51        Arrays.asList(array).subList(1, getNumElements());
52    expectContents(expectedWithDuplicateRemoved);
53  }
54
55  @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
56  @CollectionSize.Require(absent = {ZERO, ONE})
57  public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
58    E[] array = createSamplesArray();
59    array[1] = samples.e0;
60    collection = getSubjectGenerator().create(array);
61
62    List<E> expectedWithDuplicateRemoved =
63        Arrays.asList(array).subList(1, getNumElements());
64    expectContents(expectedWithDuplicateRemoved);
65  }
66
67  @CollectionFeature.Require(
68      {ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
69  @CollectionSize.Require(absent = {ZERO, ONE})
70  public void testCreateWithDuplicates_nullDuplicatesRejected() {
71    E[] array = createArrayWithNullElement();
72    array[0] = null;
73    try {
74      collection = getSubjectGenerator().create(array);
75      fail("Should reject duplicate null elements at creation");
76    } catch (IllegalArgumentException expected) {
77    }
78  }
79
80  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
81  @CollectionSize.Require(absent = {ZERO, ONE})
82  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
83    E[] array = createSamplesArray();
84    array[1] = samples.e0;
85    try {
86      collection = getSubjectGenerator().create(array);
87      fail("Should reject duplicate non-null elements at creation");
88    } catch (IllegalArgumentException expected) {
89    }
90  }
91}
92