summaryrefslogtreecommitdiffstats
path: root/layout/base/tests/test_frame_reconstruction_body_writing_mode.html
blob: 70c7e3a0f02a77f58a565c7c2ace65e96a92b100 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>
    Test for Bug 1593752: Test we don't reframe the html element when
    inserting a canonical body element with the same writing-mode.
  </title>
  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script>
  SimpleTest.waitForExplicitFinish();

  const utils = SpecialPowers.getDOMWindowUtils(window);

  function runTest() {
    document.documentElement.offsetTop;

    // We expect to construct only the canonical body because its writing-mode
    // is the same as html's writing-mode.
    const expectedFrameConstructCount = utils.framesConstructed + 1;
    document.body.before(document.createElement("body"));
    document.documentElement.offsetTop;

    is(utils.framesConstructed, expectedFrameConstructCount,
       "We should not reframe <html>!");

    SimpleTest.finish();
  }
  </script>
  <body onload="runTest();"></body>
</html>