| 1 |
/* |
| 2 |
* Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved. |
| 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 |
* |
| 5 |
* This code is free software; you can redistribute it and/or modify it |
| 6 |
* under the terms of the GNU General Public License version 2 only, as |
| 7 |
* published by the Free Software Foundation. |
| 8 |
* |
| 9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 |
* version 2 for more details (a copy is included in the LICENSE file that |
| 13 |
* accompanied this code). |
| 14 |
* |
| 15 |
* You should have received a copy of the GNU General Public License version |
| 16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
| 17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 |
* |
| 19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 |
* or visit www.oracle.com if you need additional information or have any |
| 21 |
* questions. |
| 22 |
*/ |
| 23 |
|
| 24 |
/* |
| 25 |
* @test |
| 26 |
* @bug 6301085 6192552 6365601 |
| 27 |
* @summary Basic tests for asLifoQueue |
| 28 |
* @author Martin Buchholz |
| 29 |
*/ |
| 30 |
|
| 31 |
import java.util.*; |
| 32 |
import java.util.concurrent.*; |
| 33 |
|
| 34 |
public class AsLifoQueue { |
| 35 |
|
| 36 |
private static void realMain(String[] args) throws Throwable { |
| 37 |
try { |
| 38 |
Deque<String> deq = new ArrayDeque<String>(); |
| 39 |
check(deq.addAll(Arrays.asList("b", "a", "c"))); |
| 40 |
equal(deq.toString(), "[b, a, c]"); |
| 41 |
check(deq.add("d")); |
| 42 |
equal(deq.toString(), "[b, a, c, d]"); |
| 43 |
Queue<String> q = Collections.asLifoQueue(deq); |
| 44 |
check(q.add("e")); |
| 45 |
equal(deq.toString(),"[e, b, a, c, d]"); |
| 46 |
} catch (Throwable t) { unexpected(t); } |
| 47 |
|
| 48 |
// Inspired by an excellent bug report by Jason Mehrens |
| 49 |
try { |
| 50 |
final Queue<String> q = |
| 51 |
Collections.asLifoQueue(new LinkedBlockingDeque<String>(3)); |
| 52 |
check(q.isEmpty()); equal(q.size(), 0); |
| 53 |
check(q.add("a")); check(! q.isEmpty()); equal(q.size(), 1); |
| 54 |
check(q.offer("b")); |
| 55 |
check(q.add("c")); |
| 56 |
equal(q.size(), 3); |
| 57 |
check(! q.offer("d")); |
| 58 |
equal(q.size(), 3); |
| 59 |
THROWS(IllegalStateException.class, () -> q.add("d")); |
| 60 |
equal(q.size(), 3); |
| 61 |
equal(q.toString(), "[c, b, a]"); |
| 62 |
equal(q.peek(), "c"); |
| 63 |
equal(q.element(), "c"); |
| 64 |
equal(q.remove(), "c"); |
| 65 |
equal(q.poll(), "b"); |
| 66 |
equal(q.peek(), "a"); |
| 67 |
equal(q.remove(), "a"); |
| 68 |
THROWS(NoSuchElementException.class, () -> q.remove()); |
| 69 |
equal(q.poll(), null); |
| 70 |
check(q.isEmpty()); |
| 71 |
equal(q.size(), 0); |
| 72 |
} catch (Throwable t) { unexpected(t); } |
| 73 |
|
| 74 |
THROWS(NullPointerException.class, () -> Collections.asLifoQueue(null)); |
| 75 |
} |
| 76 |
|
| 77 |
//--------------------- Infrastructure --------------------------- |
| 78 |
static volatile int passed = 0, failed = 0; |
| 79 |
static void pass() {passed++;} |
| 80 |
static void fail() {failed++; Thread.dumpStack();} |
| 81 |
static void fail(String msg) {System.out.println(msg); fail();} |
| 82 |
static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| 83 |
static void check(boolean cond) {if (cond) pass(); else fail();} |
| 84 |
static void equal(Object x, Object y) { |
| 85 |
if (x == null ? y == null : x.equals(y)) pass(); |
| 86 |
else fail(x + " not equal to " + y);} |
| 87 |
public static void main(String[] args) throws Throwable { |
| 88 |
try {realMain(args);} catch (Throwable t) {unexpected(t);} |
| 89 |
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| 90 |
if (failed > 0) throw new AssertionError("Some tests failed");} |
| 91 |
interface Fun {void f() throws Throwable;} |
| 92 |
private static void THROWS(Class<? extends Throwable> k, Fun... fs) { |
| 93 |
for (Fun f : fs) |
| 94 |
try { f.f(); fail("Expected " + k.getName() + " not thrown"); } |
| 95 |
catch (Throwable t) { |
| 96 |
if (k.isAssignableFrom(t.getClass())) pass(); |
| 97 |
else unexpected(t);}} |
| 98 |
} |
