public void testSetValue_FiresValueChangeEvent() {
ValueChangeEventTracker targetTracker = ValueChangeEventTracker.observe(target);
ValueChangeEventTracker delayedTracker = ValueChangeEventTracker.observe(delayed);
delayed.setValue(newValue);
assertEquals(1, targetTracker.count);
assertEquals(oldValue, targetTracker.event.diff.getOldValue());
assertEquals(newValue, targetTracker.event.diff.getNewValue());
assertEquals(1, delayedTracker.count);
assertEquals(oldValue, delayedTracker.event.diff.getOldValue());
assertEquals(newValue, delayedTracker.event.diff.getNewValue());
}
public void testChange_ValueChangeEvent() throws Exception {
ValueChangeEventTracker listener = ValueChangeEventTracker.observe(observable);
delegate.change(observable);
assertEquals(
formatFail("On change value change listeners should be notified."), 1, listener.count);
}
private void assertFiresPendingValueChange(Runnable runnable) {
ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(delayed);
target.setValue(newValue);
assertTrue(delayed.isStale());
assertEquals(0, tracker.count);
runnable.run();
assertFalse(delayed.isStale());
assertEquals(1, tracker.count);
assertEquals(oldValue, tracker.event.diff.getOldValue());
assertEquals(newValue, tracker.event.diff.getNewValue());
}
public void testRemoveValueChangeListener_RemovesListener() throws Exception {
ValueChangeEventTracker listener = ValueChangeEventTracker.observe(observable);
delegate.change(observable);
// precondition
assertEquals(
formatFail("Value change listeners should be notified on change."), 1, listener.count);
observable.removeValueChangeListener(listener);
delegate.change(observable);
assertEquals(
formatFail(
"Value change listeners should not be notified after they've been removed from the observable."),
1,
listener.count);
}
public void testChange_ValueChangeEventDiff() throws Exception {
ValueChangeEventTracker listener = ValueChangeEventTracker.observe(observable);
Object oldValue = observable.getValue();
delegate.change(observable);
ValueChangeEvent event = listener.event;
assertTrue(formatFail("Change Listeners were not notified on change."), listener.count > 0);
assertEquals(
formatFail(
"When a value change event is fired the old value should be the previous value of the observable value."),
oldValue,
event.diff.getOldValue());
assertEquals(
formatFail(
"When a value change event is fired the new value should be the same as the current value of the observable value."),
observable.getValue(),
event.diff.getNewValue());
}
