QueueRemoveTester.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.KNOWN_ORDER;
20import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
21import static com.google.common.collect.testing.features.CollectionSize.ONE;
22import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
23import static com.google.common.collect.testing.features.CollectionSize.ZERO;
24
25import com.google.common.annotations.GwtCompatible;
26import com.google.common.collect.testing.features.CollectionFeature;
27import com.google.common.collect.testing.features.CollectionSize;
28
29import java.util.NoSuchElementException;
30
31/**
32 * A generic JUnit test which tests {@code remove()} operations on a queue.
33 * Can't be invoked directly; please see
34 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
35 *
36 * <p>This class is GWT compatible.
37 *
38 * @author Jared Levy
39 */
40@SuppressWarnings("unchecked") // too many "unchecked generic array creations"
41@GwtCompatible
42public class QueueRemoveTester<E> extends AbstractQueueTester<E> {
43  @CollectionFeature.Require(SUPPORTS_REMOVE)
44  @CollectionSize.Require(ZERO)
45  public void testRemove_empty() {
46    try {
47      getQueue().remove();
48      fail("emptyQueue.remove() should throw");
49    } catch (NoSuchElementException expected) {}
50    expectUnchanged();
51  }
52
53  @CollectionFeature.Require(SUPPORTS_REMOVE)
54  @CollectionSize.Require(ONE)
55  public void testRemove_size1() {
56    assertEquals("size1Queue.remove() should return first element",
57        samples.e0, getQueue().remove());
58    expectMissing(samples.e0);
59  }
60
61  @CollectionFeature.Require({KNOWN_ORDER, SUPPORTS_REMOVE})
62  @CollectionSize.Require(SEVERAL)
63  public void testRemove_sizeMany() {
64    assertEquals("sizeManyQueue.remove() should return first element",
65        samples.e0, getQueue().remove());
66    expectMissing(samples.e0);
67  }
68}
69