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Java > Open Source Codes > com > db4o > db4ounit > common > querying > OrderedQueryTestCase


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o.db4ounit.common.querying;
22
23 import com.db4o.ObjectSet;
24 import com.db4o.query.Query;
25
26 import db4ounit.Assert;
27 import db4ounit.extensions.AbstractDb4oTestCase;
28
29 /**
30  * @exclude
31  */
32 public class OrderedQueryTestCase extends AbstractDb4oTestCase {
33     
34     public static void main(String JavaDoc[] args) {
35         new OrderedQueryTestCase().runSolo();
36     }
37     
38     public static final class Item {
39         public int value;
40         
41         public Item(int value) {
42             this.value = value;
43         }
44     }
45     
46     protected void store() throws Exception JavaDoc {
47         db().set(new Item(1));
48         db().set(new Item(3));
49         db().set(new Item(2));
50     }
51
52     public void testOrderAscending() {
53         final Query query = newQuery(Item.class);
54         query.descend("value").orderAscending();
55         assertQuery(new int[] { 1, 2, 3 }, query.execute());
56     }
57     
58     public void testOrderDescending() {
59         final Query query = newQuery(Item.class);
60         query.descend("value").orderDescending();
61         assertQuery(new int[] { 3, 2, 1 }, query.execute());
62     }
63
64     private void assertQuery(int[] expected, ObjectSet actual) {
65         for (int i = 0; i < expected.length; i++) {
66             Assert.isTrue(actual.hasNext());
67             Assert.areEqual(expected[i], ((Item)actual.next()).value);
68         }
69         Assert.isFalse(actual.hasNext());
70     }
71 }
72
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