1 /* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.tests.java.util.stream; 24 25 import java.util.stream.LambdaTestHelpers; 26 import java.util.stream.OpTestCase; 27 import java.util.stream.StreamTestDataProvider; 28 import org.testng.annotations.Test; 29 30 import java.util.Comparators; 31 import java.util.Iterator; 32 import java.util.concurrent.atomic.AtomicInteger; 33 import java.util.function.Function; 34 import java.util.function.Supplier; 35 import java.util.function.UnaryOperator; 36 import java.util.Spliterator; 37 import java.util.stream.Stream; 38 import java.util.stream.TestData; 39 40 import static org.testng.Assert.assertEquals; 41 import static org.testng.Assert.assertTrue; 42 43 /** 44 * SequentialOpTest 45 * 46 * @author Brian Goetz 47 */ 48 public class SequentialOpTest extends OpTestCase { 49 @SuppressWarnings({"rawtypes", "unchecked"}) 50 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class, 51 groups = { "serialization-hostile" }) 52 public void testLazy(String name, TestData.OfRef<Integer> data) { 53 Function<Integer, Integer> id = LambdaTestHelpers.identity(); 54 AtomicInteger counter = new AtomicInteger(); 55 Supplier<Stream<Integer>>[] suppliers = new Supplier[] { () -> data.stream(), () -> data.parallelStream() }; 56 UnaryOperator<Stream<Integer>>[] configs 57 = new UnaryOperator[] { 58 (UnaryOperator<Stream<Integer>>) s -> s.peek(e -> { counter.incrementAndGet(); }), 59 (UnaryOperator<Stream<Integer>>) s -> s.map(id).peek(e -> { counter.incrementAndGet(); }).sequential().map(id), 60 (UnaryOperator<Stream<Integer>>) s -> s.map(id).peek(e -> { counter.incrementAndGet(); }).parallel().map(id), 61 (UnaryOperator<Stream<Integer>>) s -> s.sequential().map(id).peek(e -> { 62 counter.incrementAndGet(); 63 }).map(id), 64 (UnaryOperator<Stream<Integer>>) s -> s.parallel().map(id).peek(e -> { counter.incrementAndGet(); }).map(id) 65 }; 66 67 for (Supplier<Stream<Integer>> supp : suppliers) 68 for (UnaryOperator<Stream<Integer>> config : configs) { 69 counter.set(0); 70 Stream<Integer> stream = config.apply(supp.get()); 71 assertEquals(0, counter.get()); 72 73 Iterator<Integer> iterator = stream.iterator(); 74 assertEquals(0, counter.get()); 75 76 if (iterator.hasNext()) 77 iterator.next(); 78 assertTrue(data.size() == 0 || counter.get() > 0); 79 80 counter.set(0); 81 stream = config.apply(supp.get()); 82 Spliterator<Integer> spliterator = stream.spliterator(); 83 assertEquals(0, counter.get()); 84 85 spliterator.forEachRemaining(e -> { 86 }); 87 assertTrue(data.size() == 0 || counter.get() > 0); 88 } 89 } 90 91 @SuppressWarnings({"rawtypes", "unchecked"}) 92 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 93 public void testMixedSeqPar(String name, TestData.OfRef<Integer> data) { 94 Function<Integer, Integer> id = LambdaTestHelpers.identity(); 95 UnaryOperator<Stream<Integer>>[] changers 96 = new UnaryOperator[] { 97 (UnaryOperator<Stream<Integer>>) s -> s, 98 (UnaryOperator<Stream<Integer>>) s -> s.sequential(), 99 (UnaryOperator<Stream<Integer>>) s -> s.parallel() 100 }; 101 UnaryOperator<Stream<Integer>>[] stuff 102 = new UnaryOperator[] { 103 (UnaryOperator<Stream<Integer>>) s -> s, 104 (UnaryOperator<Stream<Integer>>) s -> s.map(id), 105 (UnaryOperator<Stream<Integer>>) s -> s.sorted(Comparators.naturalOrder()), 106 (UnaryOperator<Stream<Integer>>) s -> s.map(id).sorted(Comparators.naturalOrder()).map(id), 107 (UnaryOperator<Stream<Integer>>) s -> s.filter(LambdaTestHelpers.pEven).sorted(Comparators.naturalOrder()).map(id), 108 }; 109 110 for (UnaryOperator<Stream<Integer>> c1 : changers) 111 for (UnaryOperator<Stream<Integer>> s1 : stuff) 112 for (UnaryOperator<Stream<Integer>> c2 : changers) 113 for (UnaryOperator<Stream<Integer>> s2 : stuff) { 114 UnaryOperator<Stream<Integer>> composed = s -> s2.apply(c2.apply(s1.apply(c1.apply(s)))); 115 exerciseOps(data, composed); 116 } 117 } 118 }