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Java > Open Source Codes > org > netbeans > modules > j2ee > persistence > wizard > fromdb > TableClosureQueueTest


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */

19
20 package org.netbeans.modules.j2ee.persistence.wizard.fromdb;
21
22 import java.util.Arrays JavaDoc;
23 import java.util.Collections JavaDoc;
24 import java.util.HashSet JavaDoc;
25 import java.util.Set JavaDoc;
26 import junit.framework.TestCase;
27 import org.netbeans.modules.j2ee.persistence.wizard.fromdb.TableClosure.Queue;
28
29 /**
30  *
31  * @author Andrei Badea
32  */

33 public class TableClosureQueueTest extends TestCase {
34
35     public void testInitialElements() {
36         Set JavaDoc<String JavaDoc> initial = new HashSet JavaDoc(Arrays.asList("a", "b"));
37         Queue<String JavaDoc> queue = new Queue<String JavaDoc>(initial);
38         Set JavaDoc<String JavaDoc> dequeued = new HashSet JavaDoc();
39         while (!queue.isEmpty()) {
40             dequeued.add(queue.poll());
41         }
42         assertNull("The poll() method should return null at the end of the queue.", queue.poll());
43         assertEquals("Should dequeue the initial elements.", initial, dequeued);
44     }
45
46     public void testCannotAddEvenDequeuedElements() {
47         Set JavaDoc<String JavaDoc> initial = Collections.emptySet();
48         Queue<String JavaDoc> queue = new Queue<String JavaDoc>(initial);
49         queue.offer("a");
50         queue.offer("b");
51         queue.offer("c");
52         // add some existing elements
53
queue.offer("a");
54         queue.offer("c");
55         assertEquals("Should poll 'a'.", "a", queue.poll());
56         assertEquals("Should poll 'b'.", "b", queue.poll());
57         // add some already dequeued elements
58
queue.offer("b");
59         queue.offer("a");
60         assertEquals("Should not poll already dequeued elements.", "c", queue.poll());
61         assertNull("The queue should be empty.", queue.poll());
62     }
63 }
64
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