<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=
-->
<head>
  <title>Test for Bug 1300461</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body onload="runTest()">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1300461">Mozilla Bug 1300461</a>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
  <script type="application/javascript">

    let chromeScript = null;
    if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
      chromeScript = SpecialPowers.loadChromeScript(() => {
        /* eslint-env mozilla/chrome-script */
        function doSend(message, fn) {
          try {
            sendAsyncMessage(message, {success: true, value: fn()});
          } catch(_) {
            sendAsyncMessage(message, {success: false});
          }
        }

        addMessageListener("requestedIndex", (id) => {
          doSend("requestedIndex", () => {
            let shistory = BrowsingContext.get(id).top.sessionHistory;
            return shistory.requestedIndex;
          })
        });
      });
    }

    async function getSHRequestedIndex(browsingContextId) {
      let p = chromeScript.promiseOneMessage("requestedIndex");
      chromeScript.sendAsyncMessage("requestedIndex", browsingContextId);
      let result = await p;
      ok(result.success, "Got requested index from parent");
      return result.value;
    }

    var testCount = 0;

    SimpleTest.waitForExplicitFinish();

    var testWindow;
    function runTest() {
      testWindow = window.open("file_bug1300461.html", "", "width=360,height=480");
      testWindow.onunload = function() { }; // to prevent bfcache
    }

    function finishTest() {
      if (chromeScript) {
        chromeScript.destroy();
      }
      testWindow.close();
      SimpleTest.finish();
    }

  </script>
</pre>
</body>
</html>
