padding-percent-orthogonal-dynamic.html

<!doctype html>
<title>CSS Writing Modes Test: Re-layout of orthogonal layouts with percentage padding</title>
<link rel="help" href="https://drafts.csswg.org/css-writing-modes/#dimension-mapping">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  #vertical {
    width: 400px;
    writing-mode: vertical-lr;
  }

  #padded {
    width: 100%;
    box-sizing: border-box;
    padding-right: 100%;
  }

  #horizontal {
    writing-mode: horizontal-tb;
    width: 100%;
  }

  #container {
    width: 100%;
    background-color: green;
  }

  #child { height: 100px; }
</style>
<div id="vertical">
  <div id="padded">
    <div id="horizontal">
      <div id="container">
        <div id="child"></div>
      </div>
    </div>
  </div>
</div>
<script>
  test(() => assert_equals(container.offsetWidth, 300),
       "400px minus 100px padding based on #child height");

  vertical.style.width = "200px";

  test(() => assert_equals(container.offsetWidth, 100),
       "200px minus 100px padding based on #child height");
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-writing-modes/padding-percent-orthogonal-dynamic.html