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/* |
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* Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 6529795 |
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* @summary next() does not change iterator state if throws NoSuchElementException |
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* @author Martin Buchholz |
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*/ |
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|
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import java.util.*; |
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import java.util.concurrent.*; |
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|
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@SuppressWarnings("unchecked") |
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public class IteratorAtEnd { |
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private static final int SIZE = 6; |
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|
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static void realMain(String[] args) throws Throwable { |
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testCollection(new ArrayList()); |
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testCollection(new Vector()); |
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testCollection(new LinkedList()); |
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testCollection(new ArrayDeque()); |
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testCollection(new TreeSet()); |
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testCollection(new CopyOnWriteArrayList()); |
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testCollection(new CopyOnWriteArraySet()); |
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testCollection(new ConcurrentSkipListSet()); |
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|
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testCollection(new PriorityQueue()); |
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testCollection(new LinkedBlockingQueue()); |
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testCollection(new ArrayBlockingQueue(100)); |
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testCollection(new ConcurrentLinkedDeque()); |
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testCollection(new ConcurrentLinkedQueue()); |
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testCollection(new LinkedTransferQueue()); |
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|
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testMap(new HashMap()); |
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testMap(new Hashtable()); |
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testMap(new LinkedHashMap()); |
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testMap(new WeakHashMap()); |
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testMap(new IdentityHashMap()); |
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testMap(new ConcurrentHashMap()); |
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testMap(new ConcurrentSkipListMap()); |
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testMap(new TreeMap()); |
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} |
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|
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static void testCollection(Collection c) { |
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try { |
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for (int i = 0; i < SIZE; i++) |
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c.add(i); |
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test(c); |
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} catch (Throwable t) { unexpected(t); } |
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} |
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|
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static void testMap(Map m) { |
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try { |
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for (int i = 0; i < 3*SIZE; i++) |
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m.put(i, i); |
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test(m.values()); |
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test(m.keySet()); |
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test(m.entrySet()); |
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} catch (Throwable t) { unexpected(t); } |
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} |
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|
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static void test(Collection c) { |
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try { |
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final Iterator it = c.iterator(); |
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THROWS(NoSuchElementException.class, |
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() -> { while (true) it.next(); }); |
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try { it.remove(); } |
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catch (UnsupportedOperationException exc) { return; } |
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pass(); |
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} catch (Throwable t) { unexpected(t); } |
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|
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if (c instanceof List) { |
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final List list = (List) c; |
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try { |
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final ListIterator it = list.listIterator(0); |
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it.next(); |
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final Object x = it.previous(); |
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THROWS(NoSuchElementException.class, () -> it.previous()); |
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try { it.remove(); } |
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catch (UnsupportedOperationException exc) { return; } |
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pass(); |
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check(! list.get(0).equals(x)); |
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} catch (Throwable t) { unexpected(t); } |
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|
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try { |
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final ListIterator it = list.listIterator(list.size()); |
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it.previous(); |
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final Object x = it.next(); |
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THROWS(NoSuchElementException.class, () -> it.next()); |
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try { it.remove(); } |
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catch (UnsupportedOperationException exc) { return; } |
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pass(); |
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check(! list.get(list.size()-1).equals(x)); |
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} catch (Throwable t) { unexpected(t); } |
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} |
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} |
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|
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//--------------------- Infrastructure --------------------------- |
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static volatile int passed = 0, failed = 0; |
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static void pass() {passed++;} |
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static void fail() {failed++; Thread.dumpStack();} |
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static void fail(String msg) {System.out.println(msg); fail();} |
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static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
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static void check(boolean cond) {if (cond) pass(); else fail();} |
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static void equal(Object x, Object y) { |
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if (x == null ? y == null : x.equals(y)) pass(); |
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else fail(x + " not equal to " + y);} |
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public static void main(String[] args) throws Throwable { |
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try {realMain(args);} catch (Throwable t) {unexpected(t);} |
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
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if (failed > 0) throw new AssertionError("Some tests failed");} |
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interface Fun {void f() throws Throwable;} |
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static void THROWS(Class<? extends Throwable> k, Fun... fs) { |
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for (Fun f : fs) |
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try { f.f(); fail("Expected " + k.getName() + " not thrown"); } |
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catch (Throwable t) { |
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if (k.isAssignableFrom(t.getClass())) pass(); |
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else unexpected(t);}} |
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} |
