test_scroll_position_restore.html

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This test gets skipped with pattern: display == 'wayland' && os_version == '22.04'
This test failed 3 times in the preceding 30 days. quicksearch this test
Manifest: layout/generic/test/mochitest.toml

<!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>