Coverage Summary for Class: QueueOfferTester (com.google.common.collect.testing.testers)

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.ALLOWS_NULL_VALUES;
20 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
21 
22 import com.google.common.annotations.GwtCompatible;
23 import com.google.common.collect.testing.features.CollectionFeature;
24 import 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 @SuppressWarnings("unchecked") // too many "unchecked generic array creations"
33 @GwtCompatible
34 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
35 public class QueueOfferTester<E> extends AbstractQueueTester<E> {
36   @CollectionFeature.Require(SUPPORTS_ADD)
37   public void testOffer_supportedNotPresent() {
38     assertTrue("offer(notPresent) should return true", getQueue().offer(e3()));
39     expectAdded(e3());
40   }
41 
42   @CollectionFeature.Require({SUPPORTS_ADD, ALLOWS_NULL_VALUES})
43   public void testOffer_nullSupported() {
44     assertTrue("offer(null) should return true", getQueue().offer(null));
45     expectAdded((E) null);
46   }
47 
48   @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
49   public void testOffer_nullUnsupported() {
50     try {
51       getQueue().offer(null);
52       fail("offer(null) should throw");
53     } catch (NullPointerException expected) {
54     }
55     expectUnchanged();
56     expectNullMissingWhenNullUnsupported("Should not contain null after unsupported offer(null)");
57   }
58 }