--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/Collections/AsLifoQueue.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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,
+                   new Fun(){void f(){ 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,
+                   new Fun(){void f(){ q.remove(); }});
+            equal(q.poll(), null);
+            check(q.isEmpty());
+            equal(q.size(), 0);
+        } catch (Throwable t) { unexpected(t); }
+    }
+
+    //--------------------- 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");}
+    static abstract class Fun { abstract 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);}}
+}