michael@0: /**
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/
michael@0:  */
michael@0: const fakeEventType = "foo";
michael@0: 
michael@0: function testEventTarget(event) {
michael@0:   if (event.target !== self) {
michael@0:     throw new Error("Event has a bad target!");
michael@0:   }
michael@0:   if (event.currentTarget) {
michael@0:     throw new Error("Event has a bad currentTarget!");
michael@0:   }
michael@0:   postMessage(event.data);
michael@0: }
michael@0: 
michael@0: addEventListener(fakeEventType, function(event) {
michael@0:   throw new Error("Trusted event listener received untrusted event!");
michael@0: }, false, false);
michael@0: 
michael@0: addEventListener(fakeEventType, function(event) {
michael@0:   if (event.target !== self || event.currentTarget !== self) {
michael@0:     throw new Error("Fake event has bad target!");
michael@0:   }
michael@0:   if (event.isTrusted) {
michael@0:     throw new Error("Event should be untrusted!");
michael@0:   }
michael@0:   event.stopImmediatePropagation();
michael@0:   postMessage(event.data);
michael@0: }, false, true);
michael@0: 
michael@0: addEventListener(fakeEventType, function(event) {
michael@0:   throw new Error("This shouldn't get called because of stopImmediatePropagation.");
michael@0: }, false, true);
michael@0: 
michael@0: var count = 0;
michael@0: onmessage = function(event) {
michael@0:   if (event.target !== self || event.currentTarget !== self) {
michael@0:     throw new Error("Event has bad target!");
michael@0:   }
michael@0: 
michael@0:   if (!count++) {
michael@0:     var exception;
michael@0:     try {
michael@0:       self.dispatchEvent(event);
michael@0:     }
michael@0:     catch(e) {
michael@0:       exception = e;
michael@0:     }
michael@0: 
michael@0:     if (!exception) {
michael@0:       throw new Error("Recursive dispatch didn't fail!");
michael@0:     }
michael@0: 
michael@0:     event = new MessageEvent(fakeEventType, { bubbles: event.bubbles,
michael@0:                                               cancelable: event.cancelable,
michael@0:                                               data: event.data,
michael@0:                                               origin: "*",
michael@0:                                               source: null
michael@0:                                             });
michael@0:     self.dispatchEvent(event);
michael@0: 
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   setTimeout(testEventTarget, 0, event);
michael@0: };