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 org.openjdk.testlib.java.util.stream.LambdaTestHelpers; 26 27 import java.util.concurrent.ArrayBlockingQueue; 28 import java.util.concurrent.ConcurrentHashMap; 29 import java.util.concurrent.ConcurrentLinkedDeque; 30 import java.util.concurrent.ConcurrentLinkedQueue; 31 import java.util.concurrent.ConcurrentSkipListMap; 32 import java.util.concurrent.ConcurrentSkipListSet; 33 import java.util.concurrent.CopyOnWriteArrayList; 34 import java.util.concurrent.CopyOnWriteArraySet; 35 import java.util.concurrent.LinkedBlockingDeque; 36 import java.util.concurrent.LinkedBlockingQueue; 37 import java.util.concurrent.LinkedTransferQueue; 38 import java.util.concurrent.PriorityBlockingQueue; 39 import java.util.function.Supplier; 40 import org.testng.annotations.DataProvider; 41 import org.testng.annotations.Test; 42 43 import java.util.*; 44 import java.util.stream.Stream; 45 46 import static org.testng.Assert.assertEquals; 47 import static org.testng.Assert.assertTrue; 48 49 /** 50 * Tests laziness of stream operations -- mutations to the source after the stream() but prior to terminal operations 51 * are reflected in the stream contents. 52 */ 53 @Test 54 public class CollectionAndMapModifyStreamTest { 55 56 @DataProvider(name = "collections") 57 public Object[][] createCollections() { 58 List<Integer> content = LambdaTestHelpers.countTo(10); 59 60 List<Collection<Integer>> collections = new ArrayList<>(); 61 collections.add(new ArrayList<>(content)); 62 collections.add(new LinkedList<>(content)); 63 collections.add(new Vector<>(content)); 64 65 collections.add(new HashSet<>(content)); 66 collections.add(new LinkedHashSet<>(content)); 67 collections.add(new TreeSet<>(content)); 68 69 Stack<Integer> stack = new Stack<>(); 70 stack.addAll(content); 71 collections.add(stack); 72 collections.add(new PriorityQueue<>(content)); 73 collections.add(new ArrayDeque<>(content)); 74 75 // Concurrent collections 76 77 collections.add(new ConcurrentSkipListSet<>(content)); 78 79 ArrayBlockingQueue<Integer> arrayBlockingQueue = new ArrayBlockingQueue<>(content.size()); 80 for (Integer i : content) 81 arrayBlockingQueue.add(i); 82 collections.add(arrayBlockingQueue); 83 collections.add(new PriorityBlockingQueue<>(content)); 84 collections.add(new LinkedBlockingQueue<>(content)); 85 collections.add(new LinkedTransferQueue<>(content)); 86 collections.add(new ConcurrentLinkedQueue<>(content)); 87 collections.add(new LinkedBlockingDeque<>(content)); 88 collections.add(new ConcurrentLinkedDeque<>(content)); 89 90 Object[][] params = new Object[collections.size()][]; 91 for (int i = 0; i < collections.size(); i++) { 92 params[i] = new Object[]{collections.get(i).getClass().getName(), collections.get(i)}; 93 } 94 95 return params; 96 } 97 98 @Test(dataProvider = "collections") 99 public void testCollectionSizeRemove(String name, Collection<Integer> c) { 100 assertTrue(c.remove(1)); 101 Stream<Integer> s = c.stream(); 102 assertTrue(c.remove(2)); 103 Object[] result = s.toArray(); 104 assertEquals(result.length, c.size()); 105 } 106 107 @DataProvider(name = "maps") 108 public Object[][] createMaps() { 109 Map<Integer, Integer> content = new HashMap<>(); 110 for (int i = 0; i < 10; i++) { 111 content.put(i, i); 112 } 113 114 Map<String, Supplier<Map<Integer, Integer>>> maps = new HashMap<>(); 115 116 maps.put(HashMap.class.getName(), () -> new HashMap<>(content)); 117 maps.put(HashMap.class.getName(), () -> new LinkedHashMap<>(content)); 118 maps.put(IdentityHashMap.class.getName(), () -> new IdentityHashMap<>(content)); 119 maps.put(WeakHashMap.class.getName(), () -> new WeakHashMap<>(content)); 120 121 maps.put(TreeMap.class.getName(), () -> new TreeMap<>(content)); 122 maps.put(TreeMap.class.getName() + ".descendingMap()", () -> new TreeMap<>(content).descendingMap()); 123 124 // The following are not lazy 125 // maps.put(TreeMap.class.getName() + ".descendingMap().descendingMap()", () -> new TreeMap<>(content).descendingMap().descendingMap()); 126 // maps.put(TreeMap.class.getName() + ".headMap()", () -> new TreeMap<>(content).headMap(content.size() - 1)); 127 // maps.put(TreeMap.class.getName() + ".descendingMap().headMap()", () -> new TreeMap<>(content).descendingMap().tailMap(content.size() - 1, false)); 128 129 // Concurrent collections 130 131 maps.put(ConcurrentHashMap.class.getName(), () -> new ConcurrentHashMap<>(content)); 132 maps.put(ConcurrentSkipListMap.class.getName(), () -> new ConcurrentSkipListMap<>(content)); 133 134 Object[][] params = new Object[maps.size()][]; 135 int i = 0; 136 for (Map.Entry<String, Supplier<Map<Integer, Integer>>> e : maps.entrySet()) { 137 params[i++] = new Object[]{e.getKey(), e.getValue()}; 138 139 } 140 141 return params; 142 } 143 144 @Test(dataProvider = "maps", groups = { "serialization-hostile" }) 145 public void testMapKeysSizeRemove(String name, Supplier<Map<Integer, Integer>> c) { 146 testCollectionSizeRemove(name + " key set", c.get().keySet()); 147 } 148 149 @Test(dataProvider = "maps", groups = { "serialization-hostile" }) 150 public void testMapValuesSizeRemove(String name, Supplier<Map<Integer, Integer>> c) { 151 testCollectionSizeRemove(name + " value set", c.get().values()); 152 } 153 154 @Test(dataProvider = "maps") 155 public void testMapEntriesSizeRemove(String name, Supplier<Map<Integer, Integer>> c) { 156 testEntrySetSizeRemove(name + " entry set", c.get().entrySet()); 157 } 158 159 private void testEntrySetSizeRemove(String name, Set<Map.Entry<Integer, Integer>> c) { 160 Map.Entry<Integer, Integer> first = c.iterator().next(); 161 assertTrue(c.remove(first)); 162 Stream<Map.Entry<Integer, Integer>> s = c.stream(); 163 Map.Entry<Integer, Integer> second = c.iterator().next(); 164 assertTrue(c.remove(second)); 165 Object[] result = s.toArray(); 166 assertEquals(result.length, c.size()); 167 } 168 } 169
