| /* |
| * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4486049 6282555 6318622 |
| * @summary toString method fails if size changes in between a call to size |
| * and an attempt to iterate. |
| * @author Josh Bloch, Martin Buchholz |
| */ |
| |
| import java.util.*; |
| import java.util.concurrent.*; |
| |
| public class ToString { |
| private static void realMain(String[] args) { |
| testCollection(new LinkedHashSet<Object>() { |
| public int size() { |
| return super.size() + 1; // Lies, lies, all lies! |
| }}); |
| testCollection(new ArrayList<Object>()); |
| testCollection(new Vector<Object>()); |
| testCollection(new CopyOnWriteArrayList<Object>()); |
| testCollection(new CopyOnWriteArraySet<Object>()); |
| } |
| |
| private static void testCollection(Collection<Object> c) { |
| System.out.println(c.getClass()); |
| equal(c.toString(), "[]"); |
| check(c.add("x")); |
| equal(c.toString(), "[x]"); |
| check(c.add("y")); |
| equal(c.toString(), "[x, y]"); |
| check(c.add(null)); |
| equal(c.toString(), "[x, y, null]"); |
| if (c instanceof AbstractCollection) { |
| check(c.add(c)); |
| equal(c.toString(), "[x, y, null, (this Collection)]"); |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| static volatile int passed = 0, failed = 0; |
| static void pass() { passed++; } |
| static void fail() { failed++; Thread.dumpStack(); } |
| static void fail(String msg) { System.out.println(msg); fail(); } |
| static void unexpected(Throwable t) { failed++; t.printStackTrace(); } |
| static void check(boolean cond) { if (cond) pass(); else fail(); } |
| static void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else {System.out.println(x + " not equal to " + y); fail(); }} |
| |
| public static void main(String[] args) throws Throwable { |
| try { realMain(args); } catch (Throwable t) { unexpected(t); } |
| |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new Exception("Some tests failed"); |
| } |
| } |