public void testAddRemoveListener() {
DisposeListener listener =
new DisposeListener() {
public void widgetDisposed(final DisposeEvent event) {
log += WIDGET_DISPOSED;
}
};
Display display = new Display();
Composite shell = new Shell(display, SWT.NONE);
shell.addDisposeListener(listener);
DisposeEvent event = new DisposeEvent(shell);
event.processEvent();
assertEquals(WIDGET_DISPOSED, log);
log = "";
shell.removeDisposeListener(listener);
event = new DisposeEvent(shell);
event.processEvent();
assertEquals("", log);
}
