/*

 * 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

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 * questions.

 */

/*

 * @test

 * @bug 6415641 6377302

 * @summary Concurrent collections are permitted to lie about their size

 * @author Martin Buchholz

 */

import java.io.*;

import java.util.*;

import java.util.concurrent.*;

@SuppressWarnings("unchecked")

public class BiggernYours {

    static final Random rnd = new Random(18675309);

    static void compareCollections(Collection c1, Collection c2) {

        Object[] c1Array = c1.toArray();

        Object[] c2Array = c2.toArray();

        check(c1Array.length == c2Array.length);

        for(Object aC1 : c1Array) {

            boolean found = false;

            for(Object aC2 : c2Array) {

                if(Objects.equals(aC1, aC2)) {

                    found = true;

                    break;

                }

            }

            if(!found)

                fail(aC1 + " not found in " + Arrays.toString(c2Array));

        }

    }

    static void compareMaps(Map m1, Map m2) {

        compareCollections(m1.keySet(),

                           m2.keySet());

        compareCollections(m1.values(),

                           m2.values());

        compareCollections(m1.entrySet(),

                           m2.entrySet());

    }

    static void compareNavigableMaps(NavigableMap m1, NavigableMap m2) {

        compareMaps(m1, m2);

        compareMaps(m1.descendingMap(),

                    m2.descendingMap());

        compareMaps(m1.tailMap(Integer.MIN_VALUE),

                    m2.tailMap(Integer.MIN_VALUE));

        compareMaps(m1.headMap(Integer.MAX_VALUE),

                    m2.headMap(Integer.MAX_VALUE));

    }

    static void compareNavigableSets(NavigableSet s1, NavigableSet s2) {

        compareCollections(s1, s2);

        compareCollections(s1.descendingSet(),

                           s2.descendingSet());

        compareCollections(s1.tailSet(Integer.MIN_VALUE),

                           s2.tailSet(Integer.MIN_VALUE));

    }

    static abstract class MapFrobber { abstract void frob(Map m); }

    static abstract class SetFrobber { abstract void frob(Set s); }

    static abstract class ColFrobber { abstract void frob(Collection c); }

    static ColFrobber adder(final int i) {

        return new ColFrobber() {void frob(Collection c) { c.add(i); }};

    }

    static final ColFrobber[] adders =

    { adder(1), adder(3), adder(2) };

    static MapFrobber putter(final int k, final int v) {

        return new MapFrobber() {void frob(Map m) { m.put(k,v); }};

    }

    static final MapFrobber[] putters =

    { putter(1, -2), putter(3, -6), putter(2, -4) };

    static void unexpected(Throwable t, Object suspect) {

        System.out.println(suspect.getClass());

        unexpected(t);

    }

    static void testCollections(Collection c1, Collection c2) {

        try {

            compareCollections(c1, c2);

            for (ColFrobber adder : adders) {

                for (Collection c : new Collection[]{c1, c2})

                    adder.frob(c);

                compareCollections(c1, c2);

            }

        } catch (Throwable t) { unexpected(t, c1); }

    }

    static void testNavigableSets(NavigableSet s1, NavigableSet s2) {

        try {

            compareNavigableSets(s1, s2);

            for (ColFrobber adder : adders) {

                for (Set s : new Set[]{s1, s2})

                    adder.frob(s);

                compareNavigableSets(s1, s2);

            }

        } catch (Throwable t) { unexpected(t, s1); }

    }

    static void testMaps(Map m1, Map m2) {

        try {

            compareMaps(m1, m2);

            for (MapFrobber putter : putters) {

                for (Map m : new Map[]{m1, m2})

                    putter.frob(m);

                compareMaps(m1, m2);

            }

        } catch (Throwable t) { unexpected(t, m1); }

    }

    static void testNavigableMaps(NavigableMap m1, NavigableMap m2) {

        try {

            compareNavigableMaps(m1, m2);

            for (MapFrobber putter : putters) {

                for (Map m : new Map[]{m1, m2})

                    putter.frob(m);

                compareNavigableMaps(m1, m2);

            }

        } catch (Throwable t) { unexpected(t, m1); }

    }

    static int randomize(int size) { return rnd.nextInt(size + 2); }

    @SuppressWarnings("serial")

    private static void realMain(String[] args) throws Throwable {

        testNavigableMaps(

            new ConcurrentSkipListMap(),

            new ConcurrentSkipListMap() {

                public int size() {return randomize(super.size());}});

        testNavigableSets(

            new ConcurrentSkipListSet(),

            new ConcurrentSkipListSet() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new CopyOnWriteArraySet(),

            new CopyOnWriteArraySet() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new CopyOnWriteArrayList(),

            new CopyOnWriteArrayList() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new TreeSet(),

            new TreeSet() {

                public int size() {return randomize(super.size());}});

        testMaps(

            new ConcurrentHashMap(),

            new ConcurrentHashMap() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new ConcurrentLinkedDeque(),

            new ConcurrentLinkedDeque() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new ConcurrentLinkedQueue(),

            new ConcurrentLinkedQueue() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new LinkedTransferQueue(),

            new LinkedTransferQueue() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new LinkedBlockingQueue(),

            new LinkedBlockingQueue() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new LinkedBlockingDeque(),

            new LinkedBlockingDeque() {

                public int size() {return randomize(super.size());}});

        testCollections(

            new ArrayBlockingQueue(5),

            new ArrayBlockingQueue(5) {

                public int size() {return randomize(super.size());}});

        testCollections(

            new PriorityBlockingQueue(5),

            new PriorityBlockingQueue(5) {

                public int size() {return randomize(super.size());}});

    }

    //--------------------- 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);}

    static void arrayEqual(Object[] x, Object[] y) {

        if (x == null ? y == null : Arrays.equals(x, y)) pass();

        else fail(Arrays.toString(x) + " not equal to " + Arrays.toString(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");}

    private static abstract class CheckedThread extends Thread {

        abstract void realRun() throws Throwable;

        public void run() {

            try {realRun();} catch (Throwable t) {unexpected(t);}}}

}