gecko-dev/docshell/test/chrome/bug582176_window.xhtml

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin" type="text/css"?>

<window id="303267Test"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        width="600"
        height="600"
        onload="runTest();"
        title="bug 582176 test">

  <script type="application/javascript" src="chrome://mochikit/content/chrome-harness.js" />
  <script type="application/javascript" src="docshell_helpers.js" />
  <script type="application/javascript"><![CDATA[
    ////
    // Bug 582176.
    //
    async function runTest()
    {
      enableBFCache(true);

      var notificationCount = 0;

      let onGlobalCreation = () => {
        ++notificationCount;
      };

      await promisePageNavigation({
        uri: "http://mochi.test:8888/chrome/docshell/test/chrome/582176_dummy.html",
        onGlobalCreation,
      });
      is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
           let testVar = content.testVar;
           content.testVar = 1;
           return testVar;
         }), undefined,
         "variable unexpectedly there already");
      is(notificationCount, 1, "Should notify on first navigation");

      await promisePageNavigation({
        uri: "http://mochi.test:8888/chrome/docshell/test/chrome/582176_dummy.html?2",
        onGlobalCreation,
      });
      is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
           return content.testVar;
         }), undefined,
         "variable should no longer be there");
      is(notificationCount, 2, "Should notify on second navigation");

      await promisePageNavigation({
        back: true,
      });
      is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
           return content.testVar;
         }), 1,
         "variable should still be there");
      is(notificationCount, 2, "Should not notify on back navigation");

      await promisePageNavigation({
        uri: "http://mochi.test:8888/chrome/docshell/test/chrome/582176_xml.xml",
        onGlobalCreation,
      });
      is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
           return content.document.body.textContent;
         }), "xslt result",
         "Transform performed successfully");
      is(notificationCount, 3, "Should notify only once on XSLT navigation");

      // Tell the framework the test is finished.
      finish();
    }

  ]]></script>
  <browser type="content" primary="true" flex="1" id="content" remote="true" maychangeremoteness="true" />
</window>