1/*
2 * Copyright (C) 2007 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.SUPPORTS_ADD;
21import static com.google.common.collect.testing.features.CollectionSize.ZERO;
22
23import com.google.common.annotations.GwtCompatible;
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 add operations on a set. Can't be
29 * invoked directly; please see
30 * {@link com.google.common.collect.testing.SetTestSuiteBuilder}.
31 *
32 * @author Kevin Bourrillion
33 */
34@GwtCompatible(emulated = true)
35public class SetAddTester<E> extends AbstractSetTester<E> {
36  @CollectionFeature.Require(SUPPORTS_ADD)
37  @CollectionSize.Require(absent = ZERO)
38  public void testAdd_supportedPresent() {
39    assertFalse("add(present) should return false", getSet().add(samples.e0));
40    expectUnchanged();
41  }
42
43  @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES})
44  @CollectionSize.Require(absent = ZERO)
45  public void testAdd_supportedNullPresent() {
46    E[] array = createArrayWithNullElement();
47    collection = getSubjectGenerator().create(array);
48    assertFalse("add(nullPresent) should return false", getSet().add(null));
49    expectContents(array);
50  }
51}
52
53