support.addVetoableChangeListener(propName, l1);
support.addVetoableChangeListener(propName, l2);
support.addVetoableChangeListener(propName, l3);
l1.clearLastEvent();
l2.clearLastEvent();
l3.clearLastEvent();
try {
support.fireVetoableChange(propName, oldValue, newValue);
fail();
} catch (PropertyVetoException e) {
// expected