<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=509055
-->
<head>
  <title>Test for Bug 509055</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/EventUtils.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=509055">Mozilla Bug 509055</a>
<p id="display"></p>
<div id="status"></div>
<div id="content">
</div>
<pre id="test">
  <script type="application/javascript">

    /** Test for Bug 509055 */

    SimpleTest.waitForExplicitFinish();

    var gGen;

    function shortWait() {
      setTimeout(function() { gGen.next(); }, 0, false);
    }

    function onChildHashchange(e) {
      // gGen might be undefined when we refresh the page, so we have to check here
      dump("onChildHashchange() called.\n");
      if (gGen)
        gGen.next();
    }

    function onChildLoad(e) {
      if (gGen)
        gGen.next();
    }

    async function* runTest() {
      var popup = window.open("file_bug509055.html", "popup 0",
                              "height=200,width=200,location=yes," +
                              "menubar=yes,status=yes,toolbar=yes,dependent=yes");
      popup.hashchangeCallback = onChildHashchange;
      popup.onload = onChildLoad;
      dump("Waiting for initial load.\n");
      yield undefined;

      // Without this wait, the change to location.hash below doesn't create a
      // SHEntry or enable the back button.
      shortWait();
      dump("Got initial load.  Spinning event loop.\n");
      yield undefined;

      popup.location.hash = "#1";
      dump("Waiting for hashchange.\n");
      yield undefined;

      popup.history.back();
      dump("Waiting for second hashchange.\n");
      yield undefined; // wait for hashchange

      popup.document.title = "Changed";

      // Wait for listeners to be notified of the title change.
      shortWait();
      dump("Got second hashchange.  Spinning event loop.\n");
      yield undefined;

      let sheTitle = "";
      if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
        var sh = SpecialPowers.wrap(popup)
                              .docShell
                              .QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
                              .sessionHistory;

        // Get the title of the inner popup's current SHEntry
        sheTitle = sh.legacySHistory.getEntryAtIndex(sh.index).title;
      } else {
        let chromeScript = SpecialPowers.loadChromeScript(() => {
          /* eslint-env mozilla/chrome-script */
          addMessageListener("getTitle", browsingContext => {
            // eslint-disable-next-line no-shadow
            let sh = browsingContext.sessionHistory;
            let title = sh.getEntryAtIndex(sh.index).title;
            sendAsyncMessage("title", title);
          });
        });

        let p = chromeScript.promiseOneMessage("title");
        let browsingContext = SpecialPowers.wrap(popup)
                                           .docShell.browsingContext;
        chromeScript.sendAsyncMessage("getTitle", browsingContext);
        sheTitle = await p;
        chromeScript.destroy();
      }
      is(sheTitle, "Changed", "SHEntry's title should change when we change.");

      popup.close();

      SimpleTest.executeSoon(SimpleTest.finish);
    }

    window.addEventListener("load", function() {
      gGen = runTest();
      gGen.next();
    });

  </script>

</body>
</html>
