| 1 |
/* |
| 2 |
* Copyright (c) 2000, 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 |
|
| 24 |
/* |
| 25 |
* @test |
| 26 |
* @bug 4245809 |
| 27 |
* @summary Basic test for LinkedHashSet. (Based on SetBash) |
| 28 |
*/ |
| 29 |
|
| 30 |
import java.io.ByteArrayInputStream; |
| 31 |
import java.io.ByteArrayOutputStream; |
| 32 |
import java.io.ObjectInputStream; |
| 33 |
import java.io.ObjectOutputStream; |
| 34 |
import java.util.Arrays; |
| 35 |
import java.util.Iterator; |
| 36 |
import java.util.LinkedHashSet; |
| 37 |
import java.util.Random; |
| 38 |
import java.util.Set; |
| 39 |
|
| 40 |
public class Basic { |
| 41 |
static Random rnd = new Random(666); |
| 42 |
|
| 43 |
public static void main(String[] args) throws Exception { |
| 44 |
int numItr = 500; |
| 45 |
int setSize = 500; |
| 46 |
|
| 47 |
for (int i=0; i<numItr; i++) { |
| 48 |
Set s1 = new LinkedHashSet(); |
| 49 |
AddRandoms(s1, setSize); |
| 50 |
|
| 51 |
Set s2 = new LinkedHashSet(); |
| 52 |
AddRandoms(s2, setSize); |
| 53 |
|
| 54 |
Set intersection = clone(s1); |
| 55 |
intersection.retainAll(s2); |
| 56 |
Set diff1 = clone(s1); diff1.removeAll(s2); |
| 57 |
Set diff2 = clone(s2); diff2.removeAll(s1); |
| 58 |
Set union = clone(s1); union.addAll(s2); |
| 59 |
|
| 60 |
if (diff1.removeAll(diff2)) |
| 61 |
throw new Exception("Set algebra identity 2 failed"); |
| 62 |
if (diff1.removeAll(intersection)) |
| 63 |
throw new Exception("Set algebra identity 3 failed"); |
| 64 |
if (diff2.removeAll(diff1)) |
| 65 |
throw new Exception("Set algebra identity 4 failed"); |
| 66 |
if (diff2.removeAll(intersection)) |
| 67 |
throw new Exception("Set algebra identity 5 failed"); |
| 68 |
if (intersection.removeAll(diff1)) |
| 69 |
throw new Exception("Set algebra identity 6 failed"); |
| 70 |
if (intersection.removeAll(diff1)) |
| 71 |
throw new Exception("Set algebra identity 7 failed"); |
| 72 |
|
| 73 |
intersection.addAll(diff1); intersection.addAll(diff2); |
| 74 |
if (!intersection.equals(union)) |
| 75 |
throw new Exception("Set algebra identity 1 failed"); |
| 76 |
|
| 77 |
if (new LinkedHashSet(union).hashCode() != union.hashCode()) |
| 78 |
throw new Exception("Incorrect hashCode computation."); |
| 79 |
|
| 80 |
Iterator e = union.iterator(); |
| 81 |
while (e.hasNext()) |
| 82 |
if (!intersection.remove(e.next())) |
| 83 |
throw new Exception("Couldn't remove element from copy."); |
| 84 |
if (!intersection.isEmpty()) |
| 85 |
throw new Exception("Copy nonempty after deleting all elements."); |
| 86 |
|
| 87 |
e = union.iterator(); |
| 88 |
while (e.hasNext()) { |
| 89 |
Object o = e.next(); |
| 90 |
if (!union.contains(o)) |
| 91 |
throw new Exception("Set doesn't contain one of its elements."); |
| 92 |
e.remove(); |
| 93 |
if (union.contains(o)) |
| 94 |
throw new Exception("Set contains element after deletion."); |
| 95 |
} |
| 96 |
if (!union.isEmpty()) |
| 97 |
throw new Exception("Set nonempty after deleting all elements."); |
| 98 |
|
| 99 |
s1.clear(); |
| 100 |
if (!s1.isEmpty()) |
| 101 |
throw new Exception("Set nonempty after clear."); |
| 102 |
} |
| 103 |
System.err.println("Success."); |
| 104 |
} |
| 105 |
|
| 106 |
static Set clone(Set s) throws Exception { |
| 107 |
Set clone; |
| 108 |
int method = rnd.nextInt(3); |
| 109 |
clone = (method==0 ? (Set) ((LinkedHashSet)s).clone() : |
| 110 |
(method==1 ? new LinkedHashSet(Arrays.asList(s.toArray())) : |
| 111 |
serClone(s))); |
| 112 |
if (!s.equals(clone)) |
| 113 |
throw new Exception("Set not equal to copy: "+method); |
| 114 |
if (!s.containsAll(clone)) |
| 115 |
throw new Exception("Set does not contain copy."); |
| 116 |
if (!clone.containsAll(s)) |
| 117 |
throw new Exception("Copy does not contain set."); |
| 118 |
return clone; |
| 119 |
} |
| 120 |
|
| 121 |
private static Set serClone(Set m) { |
| 122 |
Set result = null; |
| 123 |
try { |
| 124 |
// Serialize |
| 125 |
ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| 126 |
ObjectOutputStream out = new ObjectOutputStream(bos); |
| 127 |
out.writeObject(m); |
| 128 |
out.flush(); |
| 129 |
|
| 130 |
// Deserialize |
| 131 |
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray()); |
| 132 |
out.close(); |
| 133 |
ObjectInputStream in = new ObjectInputStream(bis); |
| 134 |
result = (Set)in.readObject(); |
| 135 |
in.close(); |
| 136 |
} catch (Exception e) { |
| 137 |
e.printStackTrace(); |
| 138 |
} |
| 139 |
return result; |
| 140 |
} |
| 141 |
|
| 142 |
static void AddRandoms(Set s, int n) throws Exception { |
| 143 |
for (int i = 0; i < n; i++) { |
| 144 |
Integer e = rnd.nextInt(n); |
| 145 |
|
| 146 |
int preSize = s.size(); |
| 147 |
boolean prePresent = s.contains(e); |
| 148 |
boolean added = s.add(e); |
| 149 |
if (!s.contains(e)) |
| 150 |
throw new Exception("Element not present after addition."); |
| 151 |
if (added == prePresent) |
| 152 |
throw new Exception("added == alreadyPresent"); |
| 153 |
int postSize = s.size(); |
| 154 |
if (added && preSize == postSize) |
| 155 |
throw new Exception("Add returned true, but size didn't change."); |
| 156 |
if (!added && preSize != postSize) |
| 157 |
throw new Exception("Add returned false, but size changed."); |
| 158 |
} |
| 159 |
} |
| 160 |
} |
