jQuery Trigger event but still have event.isTrigger false

Question

jQuery provides a isTrigger property which allows us to know if the event was a "real event" or was it only "triggered".

$(ele).on("click", function(e){
    if(e.isTrigger){
       // this event was only triggered, not a real event 
    }else{
      // this was a real event 
    }
}) 

For unit-testing purposes, is there a way to trigger a event and somehow overwrite the isTrigger property.. and in the event callback still behave (by having isTrigger === false) as if it was a real click event.. Was trying the following code:

var triggerClick = jQuery.Event("click", {
    isTrigger:false,
    data:{
        isTrigger:false
    }

but it doesn't seem to pass it correctly..

Answer 1

How about the native way, avoiding the jQuery isTrigger altogether:

function simulateClick(elem) {
  var evt = document.createEvent("MouseEvents");
  evt.initMouseEvent("click", true, true, elem,
          0, 0, 0, 0, 0, false, false, false, false, 0, null);
  if (document.createEvent) {
     elem.dispatchEvent(evt);
  } else {
     elem.fireEvent("on" + evt.eventType, evt); // support for IE crap
  }
}

To use it you'd just do:

$(ele).on("click", function(e){
    if(e.isTrigger){
       // this event was only triggered, not a real event 
       console.log('triggered');
    }else{
       // this was a real event 
       console.log('clicked');
    }
});

simulateClick(ele);

FIDDLE

Answer 2

If you are concerned about whether or not an event was trigger by the user or by code, perhaps you should extract a method and call that method directly. You can then add a userTriggered parameter and pass true or false.

$(ele).on("click", function(e){
    doWork($(this), e, true);
}

doWork($(ele), null, false);

function doWork(item, e, userTriggered)
{
    if(userTriggered) {
    }
    else {
    }
}

Then when you test your doWork method, you can pass in userTriggered as true or false to test the desired behavior. This also eliminates the dependency of browser behavior from your test, which is a good thing.