| /* |
| * Copyright (c) 2007, 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 6529795 |
| * @summary next() does not change iterator state if throws NoSuchElementException |
| * @author Martin Buchholz |
| */ |
| |
| import java.util.*; |
| import java.util.concurrent.*; |
| |
| @SuppressWarnings("unchecked") |
| public class IteratorAtEnd { |
| private static final int SIZE = 6; |
| |
| static void realMain(String[] args) throws Throwable { |
| testCollection(new ArrayList()); |
| testCollection(new Vector()); |
| testCollection(new LinkedList()); |
| testCollection(new ArrayDeque()); |
| testCollection(new TreeSet()); |
| testCollection(new CopyOnWriteArrayList()); |
| testCollection(new CopyOnWriteArraySet()); |
| testCollection(new ConcurrentSkipListSet()); |
| |
| testCollection(new PriorityQueue()); |
| testCollection(new LinkedBlockingQueue()); |
| testCollection(new ArrayBlockingQueue(100)); |
| testCollection(new ConcurrentLinkedDeque()); |
| testCollection(new ConcurrentLinkedQueue()); |
| testCollection(new LinkedTransferQueue()); |
| |
| testMap(new HashMap()); |
| testMap(new Hashtable()); |
| testMap(new LinkedHashMap()); |
| testMap(new WeakHashMap()); |
| testMap(new IdentityHashMap()); |
| testMap(new ConcurrentHashMap()); |
| testMap(new ConcurrentSkipListMap()); |
| testMap(new TreeMap()); |
| } |
| |
| static void testCollection(Collection c) { |
| try { |
| for (int i = 0; i < SIZE; i++) |
| c.add(i); |
| test(c); |
| } catch (Throwable t) { unexpected(t); } |
| } |
| |
| static void testMap(Map m) { |
| try { |
| for (int i = 0; i < 3*SIZE; i++) |
| m.put(i, i); |
| test(m.values()); |
| test(m.keySet()); |
| test(m.entrySet()); |
| } catch (Throwable t) { unexpected(t); } |
| } |
| |
| static void test(Collection c) { |
| try { |
| final Iterator it = c.iterator(); |
| THROWS(NoSuchElementException.class, |
| () -> { while (true) it.next(); }); |
| try { it.remove(); } |
| catch (UnsupportedOperationException exc) { return; } |
| pass(); |
| } catch (Throwable t) { unexpected(t); } |
| |
| if (c instanceof List) { |
| final List list = (List) c; |
| try { |
| final ListIterator it = list.listIterator(0); |
| it.next(); |
| final Object x = it.previous(); |
| THROWS(NoSuchElementException.class, () -> it.previous()); |
| try { it.remove(); } |
| catch (UnsupportedOperationException exc) { return; } |
| pass(); |
| check(! list.get(0).equals(x)); |
| } catch (Throwable t) { unexpected(t); } |
| |
| try { |
| final ListIterator it = list.listIterator(list.size()); |
| it.previous(); |
| final Object x = it.next(); |
| THROWS(NoSuchElementException.class, () -> it.next()); |
| try { it.remove(); } |
| catch (UnsupportedOperationException exc) { return; } |
| pass(); |
| check(! list.get(list.size()-1).equals(x)); |
| } 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");} |
| interface Fun {void f() throws Throwable;} |
| 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);}} |
| } |