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/*
* 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.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.PriorityQueue;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.Vector;
import java.util.WeakHashMap;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.LinkedTransferQueue;
@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);}}
}
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