* Test that the null listener doesn't appear to do anything. Or at least
* doesn't crash ....
*/
public void testNullListener()
{
final ModelChangedListener NL = new NullListener();
model.register(NL);
model.add(ModelHelper.statement(model, "S P O "));
model.remove(ModelHelper.statement(model, "X Y Z"));
model.add(ModelHelper.statements(model, "a B c; d E f"));
model.remove(ModelHelper.statements(model, "g H i; j K l"));