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<!doctype html>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=77992
-->
<head>
<meta charset="utf-8">
<title>Test for Event.timeStamp (Bug 77992)</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank"
href="https://bugzilla.mozilla.org/show_bug.cgi?id=77992">Mozilla Bug 77992</a>
<p id="display"></p>
<pre id="test">
<script type="text/js-worker" id="worker-src">
// Simply returns the event timestamp
onmessage = function(evt) {
postMessage(evt.timeStamp);
}
</script>
<script type="text/js-worker" id="shared-worker-src">
// Simply returns the event timestamp
onconnect = function(evt) {
var port = evt.ports[0];
port.onmessage = function(messageEvt) {
port.postMessage(messageEvt.timeStamp);
};
};
</script>
<script type="application/javascript">
"use strict";
SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("untriaged");
// We don't use SpecialPowers.pushPrefEnv since it can delay the test
// function until after the load event has fired which means we can't
// test the timestamp of the load event.
const kPrefName = "dom.event.highrestimestamp.enabled";
var prevPrefValue = SpecialPowers.getBoolPref(kPrefName);
SpecialPowers.setBoolPref(kPrefName, true);
testRegularEvents();
// Event.timeStamp should be relative to the time origin which is:
//
// Non-worker context: navigation start
// Dedicated worker: navigation start of the document that created the worker
// Shared worker: creation time of the shared worker
//
// See: https://w3c.github.io/web-performance/specs/HighResolutionTime2/Overview.html#sec-time-origin
function testRegularEvents() {
if (document.readyState === "complete") {
ok(false, "Onload event has already fired");
finishTests();
return;
}
var timeBeforeEvent = window.performance.now();
window.addEventListener("load", function(evt) {
var timeAfterEvent = window.performance.now();
ok(evt.timeStamp > timeBeforeEvent &&
evt.timeStamp < timeAfterEvent,
"Event timestamp (" + evt.timeStamp + ") is in expected range: (" +
timeBeforeEvent + ", " + timeAfterEvent + ")");
testWorkerEvents();
});
}
function testWorkerEvents() {
var blob = new Blob([ document.getElementById("worker-src").textContent ],
{ type: "text/javascript" });
var worker = new Worker(window.URL.createObjectURL(blob));
worker.onmessage = function(evt) {
var timeAfterEvent = window.performance.now();
ok(evt.data > timeBeforeEvent &&
evt.data < timeAfterEvent,
"Event timestamp in dedicated worker (" + evt.data +
") is in expected range: (" +
timeBeforeEvent + ", " + timeAfterEvent + ")");
worker.terminate();
testSharedWorkerEvents();
};
var timeBeforeEvent = window.performance.now();
worker.postMessage("");
}
function testSharedWorkerEvents() {
var blob =
new Blob([ document.getElementById("shared-worker-src").textContent ],
{ type: "text/javascript" });
// Delay creation of worker slightly so it is easier to distinguish
// shared worker creation time from this document's navigation start
window.setTimeout(function() {
var timeBeforeWorkerCreation = window.performance.now();
var worker = new SharedWorker(window.URL.createObjectURL(blob));
worker.port.onmessage = function(evt) {
var timeAfterEvent = window.performance.now();
ok(evt.data > 0 &&
evt.data < timeAfterEvent - timeBeforeWorkerCreation,
"Event timestamp in shared worker (" + evt.data +
") is in expected range: (0, " +
(timeAfterEvent - timeBeforeWorkerCreation) + ")");
worker.port.close();
finishTests();
};
worker.port.start();
worker.port.postMessage("");
}, 500);
}
var finishTests = function() {
SpecialPowers.setBoolPref(kPrefName, prevPrefValue);
SimpleTest.finish();
};
</script>
</pre>
</body>
</html>
|
