layout/generic/test/test_scroll_position_restore.html


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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1269539
-->
<head>
  <meta charset="utf-8">
  <title>Test for Bug 1269539</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/paint_listener.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=1269539">Mozilla Bug 1269539</a>
<p id="display"></p>
<script>
SimpleTest.waitForExplicitFinish();

var loadCount = 0;
var childWin = window.open('file_scroll_position_restore.html', '_blank');

function handleLoad() {
  if (loadCount == 0) {
    loadCount++;
    childWin.scrollTo(0, childWin.scrollMaxY);
    childWin.waitForAllPaintsFlushed(function() {
      childWin.location.reload();
    });
  } else {
    childWin.waitForAllPaintsFlushed(function() {
      // Verify that the scroll position was retained.
      // NOTE: Window.scrollMaY is a long value, so we need to round
      // Window.scrollY which is double.
      // NOTE: Window.scrollMaxY is non-standard, so difference < 1.0 would not
      // be a big problem.
      is(Math.round(childWin.scrollY), childWin.scrollMaxY);
      childWin.close();
      SimpleTest.finish();
    });
  }
}

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