guava
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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.SUPPORTS_ADD;
21
22import com.google.common.annotations.GwtCompatible;
23import com.google.common.collect.testing.features.CollectionFeature;
24import org.junit.Ignore;
25
26/**
27* A generic JUnit test which tests offer operations on a queue. Can't be invoked directly; please
28* see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
29*
30* @author Jared Levy
31*/
32@GwtCompatible
33@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
34public class QueueOfferTester<E> extends AbstractQueueTester<E> {
35@CollectionFeature.Require(SUPPORTS_ADD)
36public void testOffer_supportedNotPresent() {
37assertTrue("offer(notPresent) should return true", getQueue().offer(e3()));
38expectAdded(e3());
39}
40
41@CollectionFeature.Require({SUPPORTS_ADD, ALLOWS_NULL_VALUES})
42public void testOffer_nullSupported() {
43assertTrue("offer(null) should return true", getQueue().offer(null));
44expectAdded((E) null);
45}
46
47@CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
48public void testOffer_nullUnsupported() {
49try {
50getQueue().offer(null);
51fail("offer(null) should throw");
52} catch (NullPointerException expected) {
53}
54expectUnchanged();
55expectNullMissingWhenNullUnsupported("Should not contain null after unsupported offer(null)");
56}
57}
58