guava

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

17
package com.google.common.collect.testing.testers;
18

19
import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
20
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
21
import static com.google.common.collect.testing.features.CollectionSize.ONE;
22
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
23
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
24

25
import com.google.common.annotations.GwtCompatible;
26
import com.google.common.collect.testing.features.CollectionFeature;
27
import com.google.common.collect.testing.features.CollectionSize;
28
import org.junit.Ignore;
29

30
/**
31
 * A generic JUnit test which tests {@code poll()} operations on a queue. Can't be invoked directly;
32
 * 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.
38
public class QueuePollTester<E> extends AbstractQueueTester<E> {
39
  @CollectionFeature.Require(SUPPORTS_REMOVE)
40
  @CollectionSize.Require(ZERO)
41
  public void testPoll_empty() {
42
    assertNull("emptyQueue.poll() should return null", getQueue().poll());
43
    expectUnchanged();
44
  }
45

46
  @CollectionFeature.Require(SUPPORTS_REMOVE)
47
  @CollectionSize.Require(ONE)
48
  public void testPoll_size1() {
49
    assertEquals("size1Queue.poll() should return first element", e0(), getQueue().poll());
50
    expectMissing(e0());
51
  }
52

53
  @CollectionFeature.Require({KNOWN_ORDER, SUPPORTS_REMOVE})
54
  @CollectionSize.Require(SEVERAL)
55
  public void testPoll_sizeMany() {
56
    assertEquals("sizeManyQueue.poll() should return first element", e0(), getQueue().poll());
57
    expectMissing(e0());
58
  }
59
}
60