/*

 * Copyright (c) 2011, 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

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 * questions.

 */

/*

 * @test

 * @bug 5020931 8048207

 * @summary Unit test for Collections.checkedQueue

 * @run testng CheckedQueue

 */

import java.util.Collections;

import java.util.Queue;

import java.util.concurrent.ArrayBlockingQueue;

import org.testng.annotations.Test;

import static org.testng.Assert.fail;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertTrue;

import static org.testng.Assert.assertFalse;

public class CheckedQueue {

    /**

     * This test adds items to a queue.

     */

    @Test

    public void testAdd() {

        int arrayLength = 10;

        Queue<String> abq = Collections.checkedQueue(new ArrayBlockingQueue<>(arrayLength), String.class);

        for (int i = 0; i < arrayLength; i++) {

            abq.add(Integer.toString(i));

        }

        try {

            abq.add("full");

        } catch (IllegalStateException full) {

        }

    }

    /**

     * This test tests the CheckedQueue.add method.  It creates a queue of

     * {@code String}s gets the checked queue, and attempt to add an Integer to

     * the checked queue.

     */

    @Test(expectedExceptions = ClassCastException.class)

    public void testAddFail1() {

        int arrayLength = 10;

        ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(arrayLength + 1);

        for (int i = 0; i < arrayLength; i++) {

            abq.add(Integer.toString(i));

        }

        Queue q = Collections.checkedQueue(abq, String.class);

        q.add(0);

    }

    /**

     * This test tests the CheckedQueue.add method.  It creates a queue of one

     * {@code String}, gets the checked queue, and attempt to add an Integer to

     * the checked queue.

     */

    @Test(expectedExceptions = ClassCastException.class)

    public void testAddFail2() {

        ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1);

        Queue q = Collections.checkedQueue(abq, String.class);

        q.add(0);

    }

    /**

     * This test tests the Collections.checkedQueue method call for nulls in

     * each and both of the parameters.

     */

    @Test

    public void testArgs() {

        ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1);

        Queue q;

        try {

            q = Collections.checkedQueue(null, String.class);

            fail( "should throw NullPointerException.");

        } catch(NullPointerException npe) {

            // Do nothing

        }

        try {

            q = Collections.checkedQueue(abq, null);

            fail( "should throw NullPointerException.");

        } catch(Exception e) {

            // Do nothing

        }

        try {

            q = Collections.checkedQueue(null, null);

            fail( "should throw NullPointerException.");

        } catch(Exception e) {

            // Do nothing

        }

    }

    /**

     * This test tests the CheckedQueue.offer method.

     */

    @Test

    public void testOffer() {

        ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1);

        Queue q = Collections.checkedQueue(abq, String.class);

        try {

            q.offer(null);

            fail("should throw NullPointerException.");

        } catch (NullPointerException npe) {

            // Do nothing

        }

        try {

            q.offer(0);

            fail("should throw ClassCastException.");

        } catch (ClassCastException cce) {

            // Do nothing

        }

        assertTrue(q.offer("0"), "queue should have room");

        // no room at the inn!

        assertFalse(q.offer("1"), "queue should be full");

    }

}