01: /*
02: * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2 of the License, or (at your option) any later version.
08: *
09: * This library is distributed in the hope that it will be useful,
10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * Lesser General Public License for more details.
13: *
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, write to the Free Software
16: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17: */
18: package test.org.mandarax.reference;
19:
20: import org.mandarax.kernel.ClauseSetChangeEvent;
21: import org.mandarax.kernel.Fact;
22: import org.mandarax.kernel.Predicate;
23:
24: /**
25: * Tests adding and removing a clause set change listener.
26: * @see org.mandarax.kernel.ClauseSetChangeListener
27: * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
28: * @version 3.4 <7 March 05>
29: * @since 1.1
30: */
31: public class TestClauseSetEvents3 extends TestClauseSetEvents {
32:
33: /**
34: * Constructor.
35: */
36: public TestClauseSetEvents3() {
37: super ();
38: }
39:
40: /**
41: * Run the test.
42: */
43: public void testEvent() {
44: EventHandler handler = new EventHandler();
45: Fact fact1 = Person.getFact("isBrotherOf", "Lutz", "Klaus");
46: Fact fact2 = Person.getFact("isFatherOf", "Klaus", "Jens");
47: Predicate predicate1 = fact1.getPredicate();
48: Predicate predicate2 = fact2.getPredicate();
49:
50: // add listener and change predicate, ckeck whhether listener receives event
51: fact1.addClauseSetChangeListener(handler);
52: fact1.setPredicate(predicate2);
53:
54: ClauseSetChangeEvent lastEvent = (ClauseSetChangeEvent) handler.handledEvents
55: .peek();
56: boolean result = (handler.handledEvents.size() == 1)
57: && (lastEvent.getSource() == fact1)
58: && (lastEvent.getType() == ClauseSetChangeEvent.KEY_CHANGED);
59:
60: // now unregister listener and change predicate again .. the listener should not receive the event
61: fact1.removeClauseSetChangeListener(handler);
62: fact1.setPredicate(predicate1);
63: assertTrue(result && (handler.handledEvents.size() == 1));
64: }
65: }
|