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jsr166 |
1.1 |
/* |
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jsr166 |
1.2 |
* Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. |
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jsr166 |
1.1 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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jsr166 |
1.2 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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jsr166 |
1.1 |
*/ |
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/* |
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* @test |
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* @bug 4486049 6282555 6318622 |
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* @summary toString method fails if size changes in between a call to size |
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* and an attempt to iterate. |
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* @author Josh Bloch, Martin Buchholz |
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*/ |
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jsr166 |
1.3 |
import java.util.AbstractCollection; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.LinkedHashSet; |
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import java.util.Vector; |
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import java.util.concurrent.CopyOnWriteArrayList; |
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import java.util.concurrent.CopyOnWriteArraySet; |
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jsr166 |
1.1 |
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public class ToString { |
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private static void realMain(String[] args) { |
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testCollection(new LinkedHashSet<Object>() { |
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public int size() { |
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return super.size() + 1; // Lies, lies, all lies! |
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}}); |
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testCollection(new ArrayList<Object>()); |
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testCollection(new Vector<Object>()); |
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testCollection(new CopyOnWriteArrayList<Object>()); |
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testCollection(new CopyOnWriteArraySet<Object>()); |
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} |
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private static void testCollection(Collection<Object> c) { |
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System.out.println(c.getClass()); |
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equal(c.toString(), "[]"); |
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check(c.add("x")); |
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equal(c.toString(), "[x]"); |
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check(c.add("y")); |
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equal(c.toString(), "[x, y]"); |
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check(c.add(null)); |
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equal(c.toString(), "[x, y, null]"); |
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if (c instanceof AbstractCollection) { |
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check(c.add(c)); |
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equal(c.toString(), "[x, y, null, (this Collection)]"); |
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} |
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} |
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//--------------------- Infrastructure --------------------------- |
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static volatile int passed = 0, failed = 0; |
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static void pass() { passed++; } |
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static void fail() { failed++; Thread.dumpStack(); } |
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static void fail(String msg) { System.out.println(msg); fail(); } |
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static void unexpected(Throwable t) { failed++; t.printStackTrace(); } |
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static void check(boolean cond) { if (cond) pass(); else fail(); } |
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static void equal(Object x, Object y) { |
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if (x == null ? y == null : x.equals(y)) pass(); |
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else {System.out.println(x + " not equal to " + y); fail(); }} |
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public static void main(String[] args) throws Throwable { |
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try { realMain(args); } catch (Throwable t) { unexpected(t); } |
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
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if (failed > 0) throw new Exception("Some tests failed"); |
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} |
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} |
