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.Rule;
23:
24: /**
25: * Test whether an event of the type <code>KEY_CHANGED</code> is fired (and handled)
26: * if we change the predicate in the head of a rule.
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 TestClauseSetEvents2 extends TestClauseSetEvents {
32:
33: /**
34: * Constructor.
35: */
36: public TestClauseSetEvents2() {
37: super ();
38: }
39:
40: /**
41: * Run the test.
42: */
43: public void testEvent() {
44: EventHandler handler = new EventHandler();
45: Rule rule = Person.getRule("isGrandFatherOf", "x", "z",
46: "isFatherOf", "y", "z", "isFatherOf", "x", "y");
47: Fact fact = Person.getFact("isFatherOf", "Klaus", "Jens");
48:
49: rule.addClauseSetChangeListener(handler);
50: rule.getHead().setPredicate(fact.getPredicate());
51:
52: // now check whether the event has been fired
53: ClauseSetChangeEvent lastEvent = (ClauseSetChangeEvent) handler.handledEvents
54: .peek();
55:
56: assertTrue((handler.handledEvents.size() == 1)
57: && (lastEvent.getSource() == rule)
58: && (lastEvent.getType() == ClauseSetChangeEvent.KEY_CHANGED));
59: }
60: }
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