guava
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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
17package com.google.common.collect.testing.testers;
18
19import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
20
21import com.google.common.annotations.GwtCompatible;
22import com.google.common.collect.testing.AbstractCollectionTester;
23import com.google.common.collect.testing.Helpers;
24import com.google.common.collect.testing.features.CollectionFeature;
25import java.util.Arrays;
26import 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.
36public 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)
43public void testStreamToArrayUnknownOrder() {
44Helpers.assertEqualIgnoringOrder(
45getSampleElements(), Arrays.asList(collection.stream().toArray()));
46}
47
48@CollectionFeature.Require(KNOWN_ORDER)
49public void testStreamToArrayKnownOrder() {
50assertEquals(getOrderedElements(), Arrays.asList(collection.stream().toArray()));
51}
52
53public void testStreamCount() {
54assertEquals(getNumElements(), collection.stream().count());
55}
56}
57