001/* 002 * Copyright (C) 2013 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing.testers; 018 019import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER; 020 021import com.google.common.annotations.GwtCompatible; 022import com.google.common.collect.testing.AbstractCollectionTester; 023import com.google.common.collect.testing.Helpers; 024import com.google.common.collect.testing.features.CollectionFeature; 025import java.util.Arrays; 026import org.junit.Ignore; 027 028/** 029 * A generic JUnit test which tests {@code stream} operations on a collection. Can't be invoked 030 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 031 * 032 * @author Louis Wasserman 033 */ 034@GwtCompatible 035@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 036public class CollectionStreamTester<E> extends AbstractCollectionTester<E> { 037 /* 038 * We're not really testing the implementation of Stream, only that we're getting a Stream 039 * that corresponds to the expected elements. 040 */ 041 042 @CollectionFeature.Require(absent = KNOWN_ORDER) 043 public void testStreamToArrayUnknownOrder() { 044 synchronized (collection) { // to allow Collections.synchronized* tests to pass 045 Helpers.assertEqualIgnoringOrder( 046 getSampleElements(), Arrays.asList(collection.stream().toArray())); 047 } 048 } 049 050 @CollectionFeature.Require(KNOWN_ORDER) 051 public void testStreamToArrayKnownOrder() { 052 synchronized (collection) { // to allow Collections.synchronized* tests to pass 053 assertEquals(getOrderedElements(), Arrays.asList(collection.stream().toArray())); 054 } 055 } 056 057 public void testStreamCount() { 058 synchronized (collection) { // to allow Collections.synchronized* tests to pass 059 assertEquals(getNumElements(), collection.stream().count()); 060 } 061 } 062}