01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.assorted;
22:
23: import com.db4o.*;
24: import com.db4o.ext.*;
25: import com.db4o.foundation.Hashtable4;
26: import com.db4o.internal.*;
27: import com.db4o.query.Query;
28:
29: import db4ounit.Assert;
30: import db4ounit.extensions.AbstractDb4oTestCase;
31:
32: public class DatabaseUnicityTest extends AbstractDb4oTestCase {
33:
34: public void test() {
35: Hashtable4 ht = new Hashtable4();
36: ObjectContainerBase container = stream();
37: container.showInternalClasses(true);
38: Query q = db().query();
39: q.constrain(Db4oDatabase.class);
40: ObjectSet objectSet = q.execute();
41: while (objectSet.hasNext()) {
42: Db4oDatabase identity = (Db4oDatabase) objectSet.next();
43: Assert.isFalse(ht.containsKey(identity.i_signature));
44: ht.put(identity.i_signature, "");
45: }
46: container.showInternalClasses(false);
47: }
48:
49: }
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