1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* java-gnome, a UI library for writing GTK and GNOME programs from Java!
*
* Copyright © 2007-2010 Operational Dynamics Consulting, Pty Ltd
*
* The code in this file, and the program it is a part of, is made available
* to you by its authors as open source software: you can redistribute it
* and/or modify it under the terms of the GNU General Public License version
* 2 ("GPL") as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GPL for more details.
*
* You should have received a copy of the GPL along with this program. If not,
* see http://www.gnu.org/licenses/. The authors of this program may be
* contacted through http://java-gnome.sourceforge.net/.
*/
package org.gnome.glib;
import org.gnome.gtk.Button;
import org.gnome.gtk.GraphicalTestCase;
import org.gnome.gtk.VBox;
/**
* @author Andrew Cowie
*/
/*
* I'm really not that sure how to test this effectively, but in the course of
* debugging this test I uncovered a MASSIVE bug in the GObject code path, so
* it was worth something :)
*/
public class ValidateReferenceCounting extends GraphicalTestCase
{
public final void testManuallyTwistingRefCount() {
Button b;
VBox x;
b = new Button("Reference counting");
x = new VBox(false, 3);
// sink the floating reference.
x.add(b);
// artificially remove java-gnome's reference to b. GObject should NOT
// finalize the object, because it's packed into a Container.
GObject.removeToggleRef(b);
System.gc();
// should not result in object being finalized, of course since we
// have a Java reference to it.
GObject.addToggleRef(b);
x.remove(b);
b = null;
System.gc();
// and with any luck, we haven't segfaulted, and the object finalized.
// TODO can anyone suggest how the hell to test this better?
}
}
|
