util/Collection/IteratorAtEnd.java

/*
 * 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);}}
}
Revision:	1.7
Committed:	Mon Jan 8 03:12:03 2018 UTC (6 years, 4 months ago) by jsr166
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.6:	+28 -2 lines
Log Message:	organize imports
#	User	Rev	Content
1	jsr166	1.1	/*
2	jsr166	1.6	* Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved.
3	jsr166	1.1	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4			*
5			* This code is free software; you can redistribute it and/or modify it
6			* under the terms of the GNU General Public License version 2 only, as
7			* published by the Free Software Foundation.
8			*
9			* This code is distributed in the hope that it will be useful, but WITHOUT
10			* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11			* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12			* version 2 for more details (a copy is included in the LICENSE file that
13			* accompanied this code).
14			*
15			* You should have received a copy of the GNU General Public License version
16			* 2 along with this work; if not, write to the Free Software Foundation,
17			* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18			*
19	jsr166	1.3	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20			* or visit www.oracle.com if you need additional information or have any
21			* questions.
22	jsr166	1.1	*/
23
24			/*
25			* @test
26			* @bug 6529795
27			* @summary next() does not change iterator state if throws NoSuchElementException
28			* @author Martin Buchholz
29			*/
30
31	jsr166	1.7	import java.util.ArrayDeque;
32			import java.util.ArrayList;
33			import java.util.Collection;
34			import java.util.HashMap;
35			import java.util.Hashtable;
36			import java.util.IdentityHashMap;
37			import java.util.Iterator;
38			import java.util.LinkedHashMap;
39			import java.util.LinkedList;
40			import java.util.List;
41			import java.util.ListIterator;
42			import java.util.Map;
43			import java.util.NoSuchElementException;
44			import java.util.PriorityQueue;
45			import java.util.TreeMap;
46			import java.util.TreeSet;
47			import java.util.Vector;
48			import java.util.WeakHashMap;
49			import java.util.concurrent.ArrayBlockingQueue;
50			import java.util.concurrent.ConcurrentHashMap;
51			import java.util.concurrent.ConcurrentLinkedDeque;
52			import java.util.concurrent.ConcurrentLinkedQueue;
53			import java.util.concurrent.ConcurrentSkipListMap;
54			import java.util.concurrent.ConcurrentSkipListSet;
55			import java.util.concurrent.CopyOnWriteArrayList;
56			import java.util.concurrent.CopyOnWriteArraySet;
57			import java.util.concurrent.LinkedBlockingQueue;
58			import java.util.concurrent.LinkedTransferQueue;
59	jsr166	1.1
60			@SuppressWarnings("unchecked")
61			public class IteratorAtEnd {
62			private static final int SIZE = 6;
63
64			static void realMain(String[] args) throws Throwable {
65			testCollection(new ArrayList());
66			testCollection(new Vector());
67			testCollection(new LinkedList());
68			testCollection(new ArrayDeque());
69			testCollection(new TreeSet());
70			testCollection(new CopyOnWriteArrayList());
71			testCollection(new CopyOnWriteArraySet());
72			testCollection(new ConcurrentSkipListSet());
73
74			testCollection(new PriorityQueue());
75			testCollection(new LinkedBlockingQueue());
76			testCollection(new ArrayBlockingQueue(100));
77	jsr166	1.2	testCollection(new ConcurrentLinkedDeque());
78	jsr166	1.1	testCollection(new ConcurrentLinkedQueue());
79			testCollection(new LinkedTransferQueue());
80
81			testMap(new HashMap());
82			testMap(new Hashtable());
83			testMap(new LinkedHashMap());
84			testMap(new WeakHashMap());
85			testMap(new IdentityHashMap());
86			testMap(new ConcurrentHashMap());
87			testMap(new ConcurrentSkipListMap());
88			testMap(new TreeMap());
89			}
90
91			static void testCollection(Collection c) {
92			try {
93			for (int i = 0; i < SIZE; i++)
94			c.add(i);
95			test(c);
96			} catch (Throwable t) { unexpected(t); }
97			}
98
99			static void testMap(Map m) {
100			try {
101			for (int i = 0; i < 3*SIZE; i++)
102			m.put(i, i);
103			test(m.values());
104			test(m.keySet());
105			test(m.entrySet());
106			} catch (Throwable t) { unexpected(t); }
107			}
108
109			static void test(Collection c) {
110			try {
111			final Iterator it = c.iterator();
112			THROWS(NoSuchElementException.class,
113	jsr166	1.6	() -> { while (true) it.next(); });
114	jsr166	1.1	try { it.remove(); }
115	jsr166	1.6	catch (UnsupportedOperationException exc) { return; }
116	jsr166	1.1	pass();
117			} catch (Throwable t) { unexpected(t); }
118
119			if (c instanceof List) {
120			final List list = (List) c;
121			try {
122			final ListIterator it = list.listIterator(0);
123			it.next();
124			final Object x = it.previous();
125	jsr166	1.6	THROWS(NoSuchElementException.class, () -> it.previous());
126	jsr166	1.1	try { it.remove(); }
127	jsr166	1.6	catch (UnsupportedOperationException exc) { return; }
128	jsr166	1.1	pass();
129			check(! list.get(0).equals(x));
130			} catch (Throwable t) { unexpected(t); }
131
132			try {
133			final ListIterator it = list.listIterator(list.size());
134			it.previous();
135			final Object x = it.next();
136	jsr166	1.6	THROWS(NoSuchElementException.class, () -> it.next());
137	jsr166	1.1	try { it.remove(); }
138	jsr166	1.6	catch (UnsupportedOperationException exc) { return; }
139	jsr166	1.1	pass();
140			check(! list.get(list.size()-1).equals(x));
141			} catch (Throwable t) { unexpected(t); }
142			}
143			}
144
145			//--------------------- Infrastructure ---------------------------
146			static volatile int passed = 0, failed = 0;
147			static void pass() {passed++;}
148			static void fail() {failed++; Thread.dumpStack();}
149			static void fail(String msg) {System.out.println(msg); fail();}
150			static void unexpected(Throwable t) {failed++; t.printStackTrace();}
151			static void check(boolean cond) {if (cond) pass(); else fail();}
152			static void equal(Object x, Object y) {
153			if (x == null ? y == null : x.equals(y)) pass();
154			else fail(x + " not equal to " + y);}
155			public static void main(String[] args) throws Throwable {
156			try {realMain(args);} catch (Throwable t) {unexpected(t);}
157			System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
158			if (failed > 0) throw new AssertionError("Some tests failed");}
159	jsr166	1.6	interface Fun {void f() throws Throwable;}
160	jsr166	1.1	static void THROWS(Class<? extends Throwable> k, Fun... fs) {
161			for (Fun f : fs)
162			try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
163			catch (Throwable t) {
164			if (k.isAssignableFrom(t.getClass())) pass();
165			else unexpected(t);}}
166			}