servo/tests/wpt/css-tests/css-writing-modes-3_dev/html/margin-collapse-vrl-016.htm

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>CSS Writing Modes Test: 'vertical-rl' and margin collapsing - elements with 'overflow' set to 'hidden'</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#logical-direction-layout" title="7.4 Flow-Relative Mappings">
<link rel="match" href="reference/ref-if-there-is-no-red.htm">
<!--
Test adapted from
http://test.csswg.org/suites/css2.1/nightly-unstable/html4/margin-collapse-009.htm
"
The margin collapsing rules apply exactly with the block-start margin substituted for the top margin and the block-end margin substituted for the bottom margin.
"
-->
<meta content="ahem image" name="flags">
<meta name="assert" content="This test checks that elements with 'overflow' set to 'hidden' do not collapse margin with in-flow children in 'vertical-rl' writing-mode.">
<style type="text/css">
div
{
font: 25px/1em Ahem;
height: 4em;
}
div#wrapper
{
writing-mode: vertical-rl;
width: 4em;
}
div#overflow
{
margin-right: 2em; /* block-start margin of overflowed block */
overflow: hidden;
width: 2em;
}
div#nested
{
background-color: red;
margin-right: 2em; /* block-start margin of sub-block */
width: 4em;
}
</style>
</head>
<body>
<p>Test passes if there is <strong>no red</strong>.</p>
<div id="wrapper">
<div id="overflow">
<div id="nested"></div>
</div>
</div>
</body>
</html>