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/*
* Copyright (c) 2005, 2014, 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 6301085 6192552 6365601
* @summary Basic tests for asLifoQueue
* @author Martin Buchholz
*/
import java.util.*;
import java.util.concurrent.*;
public class AsLifoQueue {
private static void realMain(String[] args) throws Throwable {
try {
Deque<String> deq = new ArrayDeque<String>();
check(deq.addAll(Arrays.asList("b", "a", "c")));
equal(deq.toString(), "[b, a, c]");
check(deq.add("d"));
equal(deq.toString(), "[b, a, c, d]");
Queue<String> q = Collections.asLifoQueue(deq);
check(q.add("e"));
equal(deq.toString(),"[e, b, a, c, d]");
} catch (Throwable t) { unexpected(t); }
// Inspired by an excellent bug report by Jason Mehrens
try {
final Queue<String> q =
Collections.asLifoQueue(new LinkedBlockingDeque<String>(3));
check(q.isEmpty()); equal(q.size(), 0);
check(q.add("a")); check(! q.isEmpty()); equal(q.size(), 1);
check(q.offer("b"));
check(q.add("c"));
equal(q.size(), 3);
check(! q.offer("d"));
equal(q.size(), 3);
THROWS(IllegalStateException.class, () -> q.add("d"));
equal(q.size(), 3);
equal(q.toString(), "[c, b, a]");
equal(q.peek(), "c");
equal(q.element(), "c");
equal(q.remove(), "c");
equal(q.poll(), "b");
equal(q.peek(), "a");
equal(q.remove(), "a");
THROWS(NoSuchElementException.class, () -> q.remove());
equal(q.poll(), null);
check(q.isEmpty());
equal(q.size(), 0);
} catch (Throwable t) { unexpected(t); }
THROWS(NullPointerException.class, () -> Collections.asLifoQueue(null));
}
//--------------------- 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 fail(x + " not equal to " + y);}
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 AssertionError("Some tests failed");}
interface Fun {void f() throws Throwable;}
private static void THROWS(Class<? extends Throwable> k, Fun... fs) {
for (Fun f : fs)
try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
catch (Throwable t) {
if (k.isAssignableFrom(t.getClass())) pass();
else unexpected(t);}}
}
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