| /* |
| * Copyright (c) 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 6215625 |
| * @summary Check correct behavior when last element is removed. |
| * @author Martin Buchholz |
| */ |
| |
| import java.util.*; |
| import java.util.concurrent.*; |
| |
| public class LastElement { |
| void test(String[] args) throws Throwable { |
| testQueue(new LinkedBlockingQueue<Integer>()); |
| testQueue(new LinkedBlockingDeque<Integer>()); |
| testQueue(new ArrayBlockingQueue<Integer>(10, true)); |
| testQueue(new ArrayBlockingQueue<Integer>(10, false)); |
| testQueue(new LinkedTransferQueue<Integer>()); |
| |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new Exception("Some tests failed"); |
| } |
| |
| void testQueue(BlockingQueue<Integer> q) throws Throwable { |
| Integer one = 1; |
| Integer two = 2; |
| Integer three = 3; |
| |
| // remove(Object) |
| q.put(one); |
| q.put(two); |
| check(! q.isEmpty() && q.size() == 2); |
| check(q.remove(one)); |
| check(q.remove(two)); |
| check(q.isEmpty() && q.size() == 0); |
| q.put(three); |
| try {check(q.take() == three);} |
| catch (Throwable t) {unexpected(t);} |
| check(q.isEmpty() && q.size() == 0); |
| |
| // iterator().remove() |
| q.clear(); |
| q.put(one); |
| check(q.offer(two)); |
| check(! q.isEmpty() && q.size() == 2); |
| Iterator<Integer> i = q.iterator(); |
| check(i.next() == one); |
| i.remove(); |
| check(i.next() == two); |
| i.remove(); |
| check(q.isEmpty() && q.size() == 0); |
| q.put(three); |
| try {check(q.take() == three);} |
| catch (Throwable t) {unexpected(t);} |
| check(q.isEmpty() && q.size() == 0); |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| volatile int passed = 0, failed = 0; |
| void pass() {passed++;} |
| void fail() {failed++; Thread.dumpStack();} |
| void fail(String msg) {System.err.println(msg); fail();} |
| void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| void check(boolean cond) {if (cond) pass(); else fail();} |
| void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| new LastElement().instanceMain(args);} |
| public void instanceMain(String[] args) throws Throwable { |
| try {test(args);} catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| } |