test_discardSystemSource.xhtml

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<?xml version="1.0"?>

<?xml-stylesheet type="text/css" href="chrome://global/skin"?>

<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=990353

-->

<window title="Mozilla Bug 990353"

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test results are displayed in the html:body -->

  <body xmlns="http://www.w3.org/1999/xhtml">

  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=990353"

     target="_blank">Mozilla Bug 990353</a>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript">

  <![CDATA[

  /** Test for Bug 990353 **/

  SimpleTest.waitForExplicitFinish();

  function canary() {

    // eslint-disable-next-line no-unused-vars

    var someBitOfSource = 42;

  var gLoadCount = 0;

  function frameLoaded() {

    switch (++gLoadCount) {

      case 1:

        ok(/native code/.test(window[0].canary.toString()), "System function should be sourceless: " + window[0].canary.toString());

        ok(/native code/.test(window[0].onload.toString()), "System event handler should be sourceless: " + window[0].onload.toString());

        var sb = new Cu.Sandbox("https://www.example.com", { discardSource: true });

        Cu.evalInSandbox('function canary() { var someBitOfSource = 42; }', sb);

        ok(/native code/.test(sb.canary.toString()), "Function from sandbox with explicit discarding should be sourceless");

        try {

          window[0].throwSomething();

          ok(false, "should have thrown");

        } catch (e) {

          ok(/some error/.test(e), "Threw exception as expected: " + e);

          ok(/throwSomething/.test(e.stack), "Exception stack trace works: " + e.stack);

        window[0].location = "https://example.org/tests/js/xpconnect/tests/chrome/file_discardSystemSource.html";

        break;

      case 2:

        ok(/someBitOfSource/.test(Cu.waiveXrays(window[0]).canary.toString()), "Content function should have source");

        ok(/someBitOfSource/.test(Cu.waiveXrays(window[0]).onload.toString()), "Content event handler should have source");

        testWorker();

        break;

  function testWorker() {

    var worker = new window[0].wrappedJSObject.Worker('worker_discardSystemSource.js');

    worker.onmessage = function(evt) {

      ok(/someBitOfSource/.test(evt.data), "Non-chrome worker should have source: " + evt.data);

      var chromeWorker = new Worker('worker_discardSystemSource.js');

      chromeWorker.onmessage = function(evt) {

        ok(/native code/.test(evt.data), "Chrome worker should not have source: " + evt.data);

        SimpleTest.finish();

  function go() {

    // We should have our own source, because the pref wasn't enabled when we

    // were loaded.

    ok(/someBitOfSource/.test(canary.toString()), "Should have own source");

    window[0].frameElement.onload = frameLoaded;

    window[0].location = "file_discardSystemSource.html";

  addLoadEvent(function() {

    SpecialPowers.pushPrefEnv({set: [['javascript.options.discardSystemSource', true]]}, go);

});

]]>

  </script>

  <iframe></iframe>

</window>