testOnCancel() {
    initCard();

    showDelay = 500;
    testingEvents.fireMouseOverEvent(john, elsewhere);
    timer.tick(showDelay - 1);
    testingEvents.fireMouseOutEvent(john, elsewhere);
    testingEvents.fireMouseMoveEvent(document, offAnchor);
    timer.tick(10);
    assertFalse('Card should be hidden', card.isVisible());
    assertEquals('Should have cancelled trigger', john, cancelledElement);
  }
Verify that CANCEL_TRIGGER event occurs when mouse goes out of
triggering element before hovercard is shown.