<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=640387
-->
<head>
  <title>Test for Bug 640387</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=640387">Mozilla Bug 640387</a>

<script type='application/javascript'>
SimpleTest.waitForExplicitFinish();

function* test() {
  /* Spin the event loop so we get out of the onload handler. */
  SimpleTest.executeSoon(function() { gGen.next(); });
  yield undefined;

  popup.history.pushState("", "", "#hash1");
  popup.history.pushState("", "", "#hash2");

  // Now the history looks like:
  //   file_bug640387.html
  //   file_bug640387.html#hash1
  //   file_bug640387.html#hash2  <-- current

  // Going back should trigger a hashchange, which will wake us up from the
  // yield.
  popup.history.back();
  yield undefined;
  ok(true, "Got first hashchange.");

  // Going back should wake us up again.
  popup.history.back();
  yield undefined;
  ok(true, "Got second hashchange.");

  // Now the history looks like:
  //   file_bug640387.html        <-- current
  //   file_bug640387.html#hash1
  //   file_bug640387.html#hash2

  // Going forward should trigger a hashchange.
  popup.history.forward();
  yield undefined;
  ok(true, "Got third hashchange.");

  // Now modify the history so it looks like:
  //   file_bug640387.html
  //   file_bug640387.html#hash1
  //   file_bug640387.html#hash1  <-- current
  popup.history.pushState("", "", "#hash1");

  // Now when we go back, we should not get a hashchange.  Instead, wait for a
  // popstate.  We need to asynchronously go back because popstate is fired
  // sync.
  gHashchangeExpected = false;
  gCallbackOnPopstate = true;
  SimpleTest.executeSoon(function() { popup.history.back(); });
  yield undefined;
  ok(true, "Got popstate.");
  gCallbackOnPopstate = false;

  // Spin the event loop so hashchange has a chance to fire, if it's going to.
  SimpleTest.executeSoon(function() { gGen.next(); });
  yield undefined;

  popup.close();
  SimpleTest.finish();
}

var gGen = null;
function childLoad() {
  gGen = test();
  gGen.next();
}

var gHashchangeExpected = true;
function childHashchange() {
  if (gHashchangeExpected) {
    gGen.next();
  } else {
    ok(false, "Got hashchange when we weren't expecting one.");
  }
}

var gCallbackOnPopstate = false;
function childPopstate() {
  if (gCallbackOnPopstate) {
    gGen.next();
  }
}

/* We need to run this test in a popup, because navigating an iframe
 * back/forwards tends to cause intermittent orange. */
var popup = window.open("file_bug640387.html");

/* Control now flows up to childLoad(), called once the popup loads. */

</script>

</body>
</html>
