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.KNOWN_ORDER;
20import static com.google.common.collect.testing.features.CollectionSize.ONE;
21import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
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;
27import java.util.NoSuchElementException;
28import org.junit.Ignore;
29
30/**
31* A generic JUnit test which tests {@code element()} operations on a queue. Can't be invoked
32* directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
33*
34* @author Jared Levy
35*/
36@GwtCompatible
37@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
38public class QueueElementTester<E> extends AbstractQueueTester<E> {
39@CollectionSize.Require(ZERO)
40public void testElement_empty() {
41try {
42getQueue().element();
43fail("emptyQueue.element() should throw");
44} catch (NoSuchElementException expected) {
45}
46expectUnchanged();
47}
48
49@CollectionSize.Require(ONE)
50public void testElement_size1() {
51assertEquals("size1Queue.element() should return first element", e0(), getQueue().element());
52expectUnchanged();
53}
54
55@CollectionFeature.Require(KNOWN_ORDER)
56@CollectionSize.Require(SEVERAL)
57public void testElement_sizeMany() {
58assertEquals("sizeManyQueue.element() should return first element", e0(), getQueue().element());
59expectUnchanged();
60}
61}
62