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) testStreamToArrayUnknownOrder()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) testStreamToArrayKnownOrder()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 testStreamCount()57 public void testStreamCount() { 58 synchronized (collection) { // to allow Collections.synchronized* tests to pass 59 assertEquals(getNumElements(), collection.stream().count()); 60 } 61 } 62 } 63