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<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=
-->
<head>
  <title>Test for Bug 1379762</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=1379762">Mozilla Bug 1379762</a>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
  <script type="application/javascript">
    /**
     * - This page opens new window
     * - new window sends 'init' msg
     * - onload() in new window sends 'increment_loadCount' msg
     * - onpageshow() in new window sends 'increment_testCount' msg
     * - This page sends 'forward_back' msg
     * - onpageshow() in new window 'increment_testCount'
     * - This page sends 'finish_test' msg
     * - onpageshow() in new window sends 'finished' msg
     */
    var testCount = 0; // Used by the test files.
    var loadCount = 0;
    var goneBack = false;
    var bc = new BroadcastChannel("bug1379762");
    bc.onmessage = (messageEvent) => {
      let message = messageEvent.data;
      if (message == "init") {
        is(testCount, 0, "new window should only be loaded once; otherwise the loadCount variable makes no sense");
      } else if (message == "increment_loadCount") {
        loadCount++;
        is(loadCount, 1, "Should only get one load")
      } else if (message == 'increment_testCount') {
        testCount++;
        if (testCount == 1) {
          bc.postMessage("forward_back");
          goneBack = true;
        } else if (testCount == 2) {
          ok(goneBack, "We had a chance to navigate backwards and forwards in the new window to test BFCache");
          bc.postMessage("finish_test");
        }
      } else if (message == "finished") {
        bc.close();
        SimpleTest.finish();
      }
    }

    SimpleTest.waitForExplicitFinish();

    function runTest() {
      // If Fission is disabled, the pref is no-op.
      SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
        window.open("file_bug1379762-1.html", "", "width=360,height=480,noopener");
      });
    }

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