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.CollectionSize.ZERO;
21
22import com.google.common.annotations.GwtCompatible;
23import com.google.common.collect.testing.AbstractCollectionTester;
24import com.google.common.collect.testing.features.CollectionFeature;
25import com.google.common.collect.testing.features.CollectionSize;
26
27/**
28 * A generic JUnit test which tests creation (typically through a constructor or
29 * static factory method) of a collection. Can't be invoked directly; please see
30 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
31 *
32 * @author Chris Povirk
33 */
34@GwtCompatible(emulated = true)
35public class CollectionCreationTester<E> extends AbstractCollectionTester<E> {
36  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
37  @CollectionSize.Require(absent = ZERO)
38  public void testCreateWithNull_supported() {
39    E[] array = createArrayWithNullElement();
40    collection = getSubjectGenerator().create(array);
41    expectContents(array);
42  }
43
44  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
45  @CollectionSize.Require(absent = ZERO)
46  public void testCreateWithNull_unsupported() {
47    E[] array = createArrayWithNullElement();
48
49    try {
50      getSubjectGenerator().create(array);
51      fail("Creating a collection containing null should fail");
52    } catch (NullPointerException expected) {
53    }
54  }
55}
56
57