d771fc3a6b
Reviewed-by: martin
167 lines
6.3 KiB
Java
167 lines
6.3 KiB
Java
/*
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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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* @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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import java.util.ArrayDeque;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Hashtable;
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import java.util.IdentityHashMap;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.ListIterator;
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import java.util.Map;
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import java.util.NoSuchElementException;
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import java.util.PriorityQueue;
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import java.util.TreeMap;
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import java.util.TreeSet;
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import java.util.Vector;
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import java.util.WeakHashMap;
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import java.util.concurrent.ArrayBlockingQueue;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentLinkedDeque;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.ConcurrentSkipListMap;
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import java.util.concurrent.ConcurrentSkipListSet;
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import java.util.concurrent.CopyOnWriteArrayList;
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import java.util.concurrent.CopyOnWriteArraySet;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.LinkedTransferQueue;
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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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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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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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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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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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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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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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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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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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//--------------------- 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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}
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