tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

test_eventTimeStamp.html (4017B)

      1 <!doctype html>
      2 <html>
      3 <!--
      4 https://bugzilla.mozilla.org/show_bug.cgi?id=77992
      5 -->
      6 <head>
      7  <meta charset="utf-8">
      8  <title>Test for Event.timeStamp (Bug 77992)</title>
      9  <script src="/tests/SimpleTest/SimpleTest.js"></script>
     10  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
     11 </head>
     12 <body>
     13 <a target="_blank"
     14  href="https://bugzilla.mozilla.org/show_bug.cgi?id=77992">Mozilla Bug 77992</a>
     15 <p id="display"></p>
     16 <pre id="test">
     17 <script type="text/js-worker" id="worker-src">
     18  // Simply returns the event timestamp
     19  onmessage = function(evt) {
     20    postMessage(evt.timeStamp + performance.timeOrigin);
     21  }
     22 </script>
     23 <script type="text/js-worker" id="shared-worker-src">
     24  // Simply returns the event timestamp
     25  onconnect = function(evt) {
     26    var port = evt.ports[0];
     27    port.onmessage = function(messageEvt) {
     28      port.postMessage(messageEvt.timeStamp + performance.timeOrigin);
     29    };
     30  };
     31 </script>
     32 <script type="application/javascript">
     33 "use strict";
     34 
     35 SimpleTest.waitForExplicitFinish();
     36 SimpleTest.requestFlakyTimeout("untriaged");
     37 
     38 // This file performs tests that normalize the timeOrigin within a worker
     39 // and compare it to the page. When this occurs, time can appear to go backwards.
     40 // This is a known (and accepted) regression of privacy.reduceTimerPrecision so
     41 // we need to turn it off.
     42 SpecialPowers.pushPrefEnv({ "set": [
     43    ["privacy.reduceTimerPrecision", false]
     44  ]}, testRegularEvents);
     45 
     46 // Event.timeStamp should be relative to the time origin which is:
     47 //
     48 //   Non-worker context: navigation start
     49 //   Dedicated worker: navigation start of the document that created the worker
     50 //   Shared worker: creation time of the shared worker
     51 //
     52 // See: https://w3c.github.io/web-performance/specs/HighResolutionTime2/Overview.html#sec-time-origin
     53 
     54 function testRegularEvents() {
     55  var timeBeforeEvent = performance.now();
     56  document.getElementById('test').addEventListener("click", function(evt) {
     57    var timeAfterEvent = performance.now();
     58    ok(evt.timeStamp >= timeBeforeEvent &&
     59       evt.timeStamp <= timeAfterEvent,
     60       "Event timestamp (" + evt.timeStamp + ") is in expected range: [" +
     61         timeBeforeEvent + ", " + timeAfterEvent + "]");
     62    testWorkerEvents();
     63  });
     64  document.getElementById('test').click();
     65 }
     66 
     67 function testWorkerEvents() {
     68  var blob = new Blob([ document.getElementById("worker-src").textContent ],
     69                      { type: "text/javascript" });
     70  var worker = new Worker(URL.createObjectURL(blob));
     71  worker.onmessage = function(evt) {
     72    var timeAfterEvent = performance.now() + performance.timeOrigin;
     73    ok(evt.data >= timeBeforeEvent &&
     74       evt.data <= timeAfterEvent,
     75       "Event timestamp in dedicated worker (" + evt.data +
     76         ") is in expected range: [" +
     77         timeBeforeEvent + ", " + timeAfterEvent + "]");
     78    worker.terminate();
     79    testSharedWorkerEvents();
     80  };
     81  var timeBeforeEvent = performance.now() + performance.timeOrigin;
     82  worker.postMessage("");
     83 }
     84 
     85 function testSharedWorkerEvents() {
     86  var blob =
     87    new Blob([ document.getElementById("shared-worker-src").textContent ],
     88             { type: "text/javascript" });
     89  // Delay creation of worker slightly so it is easier to distinguish
     90  // shared worker creation time from this document's navigation start
     91  setTimeout(function() {
     92  var timeBeforeEvent = performance.now() + performance.timeOrigin;
     93    var worker = new SharedWorker(URL.createObjectURL(blob));
     94    worker.port.onmessage = function(evt) {
     95      var timeAfterEvent = performance.now() + performance.timeOrigin;
     96      ok(evt.data >= timeBeforeEvent &&
     97         evt.data <= timeAfterEvent,
     98         "Event timestamp in shared worker (" + evt.data +
     99           ") is in expected range: [" +
    100           timeBeforeEvent + ", " + timeAfterEvent + "]");
    101      worker.port.close();
    102      finishTests();
    103    };
    104    worker.port.start();
    105    worker.port.postMessage("");
    106  }, 500);
    107 }
    108 
    109 var finishTests = function() {
    110  SimpleTest.finish();
    111 };
    112 
    113 </script>
    114 </pre>
    115 </body>
    116 </html>