dom/workers/test/test_dynamicImport_early_termination.html

   1 <!--
   2   Any copyright is dedicated to the Public Domain.
   3   http://creativecommons.org/publicdomain/zero/1.0/
   4 -->
   5 <!DOCTYPE HTML>
   6 <html>
   7 <!--
   8 Tests of Worker Dynamic Import (Bug 1540913)
   9 Ensure that the script loader doesn't fail if requests are terminated early.
  10 -->
  11 <head>
  12   <title>Test for Worker Dynamic Import (Bug 1540913)</title>
  13   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  14   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  15 </head>
  16 <body onload="onLoad()">
  17 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1540913">Worker Dynamic Import
  18  Bug 1540913</a>
  19 <p id="display"></p>
  20 <div id="content" style="display: none">
  21
  22 </div>
  23 <pre id="test">
  24 <script class="testbody" type="text/javascript">
  25 SimpleTest.waitForExplicitFinish();
  26
  27 async function onLoad() {
  28   await SpecialPowers.pushPrefEnv(
  29       { set: [["dom.workers.modules.enabled", true ]] });
  30
  31   const workers = [
  32     new Worker("dynamicImport_worker.js", {type: "classic"}),
  33     new Worker("dynamicImport_worker.js", {type: "module"})
  34   ]
  35
  36   let successCount = 0;
  37
  38   // In the implementation of dynamic import, every dynamic import has
  39   // it's own ScriptLoader. To ensure that this is working correctly,
  40   // this tests that if we re-order the dynamic import order,
  41   // worker termination works as expected.
  42   for (const worker of workers) {
  43     const events = [];
  44     worker.onmessage = function(event) {
  45       switch (event.data) {
  46         case "first":
  47           ok(false, "first dynamic import returned");
  48           SimpleTest.finish();
  49           break;
  50         case "second":
  51           ok(events.length === 0,
  52              "second dynamic import returned");
  53           events.push(event.data);
  54           worker.terminate()
  55           successCount++;
  56           // Cheap way to make sure we only finish successfully after
  57           // both the module and classic test is finished.
  58           if (successCount == 2) {
  59             SimpleTest.finish();
  60           }
  61           break;
  62         default:
  63           ok(false, "Unexpected message:" + event.data);
  64           SimpleTest.finish();
  65       }
  66     };
  67
  68     worker.onerror = function(event) {
  69       ok(false, "Worker had an error:" + event.message);
  70       SimpleTest.finish();
  71     }
  72
  73     worker.postMessage("start");
  74   }
  75 }
  76 </script>
  77 </pre>
  78 </body>
  79 </html>