85 lines
3.3 KiB
Java
85 lines
3.3 KiB
Java
/*
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* Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved.
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* 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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* 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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*/
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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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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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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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}
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