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

1 /*
2  * Copyright (C) 2013 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 
21 import com.google.common.annotations.GwtCompatible;
22 import com.google.common.collect.testing.AbstractCollectionTester;
23 import com.google.common.collect.testing.Helpers;
24 import com.google.common.collect.testing.features.CollectionFeature;
25 import java.util.Arrays;
26 import org.junit.Ignore;
27 
28 /**
29  * A generic JUnit test which tests {@code stream} operations on a collection. Can't be invoked
30  * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
31  *
32  * @author Louis Wasserman
33  */
34 @GwtCompatible
35 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
36 public class CollectionStreamTester<E> extends AbstractCollectionTester<E> {
37   /*
38    * We're not really testing the implementation of Stream, only that we're getting a Stream
39    * that corresponds to the expected elements.
40    */
41 
42   @CollectionFeature.Require(absent = KNOWN_ORDER)
43   public void testStreamToArrayUnknownOrder() {
44     synchronized (collection) { // to allow Collections.synchronized* tests to pass
45       Helpers.assertEqualIgnoringOrder(
46           getSampleElements(), Arrays.asList(collection.stream().toArray()));
47     }
48   }
49 
50   @CollectionFeature.Require(KNOWN_ORDER)
51   public void testStreamToArrayKnownOrder() {
52     synchronized (collection) { // to allow Collections.synchronized* tests to pass
53       assertEquals(getOrderedElements(), Arrays.asList(collection.stream().toArray()));
54     }
55   }
56 
57   public void testStreamCount() {
58     synchronized (collection) { // to allow Collections.synchronized* tests to pass
59       assertEquals(getNumElements(), collection.stream().count());
60     }
61   }
62 }