style-css-mislabeled-as-html-nosniff.sub.html

<!DOCTYPE html>
<!-- Test verifies that a stylesheet mislabeled as html won't execute with and
  without CORB if the nosniff response header is present.

  The expected behavior is covered by the Fetch spec at
  https://fetch.spec.whatwg.org/#should-response-to-request-be-blocked-due-to-nosniff?

  See also the following tests:
  - fetch/nosniff/stylesheet.html
-->
<meta charset="utf-8">
<title>CSS is not applied (because of nosniff + non-text/css headers)</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>

<!-- Default style that will be applied if the external stylesheet resource
  below won't load for any reason.  This stylesheet will set h1's
  color to green (see |default_color| below). -->
<style>
h1 { color: green; }
</style>

<!-- This stylesheet (if loaded) should set h1#header's color to red
    (see |external_color| below). -->
<!-- www1 is cross-origin, so the HTTP response is CORB-eligible -->
<link rel="stylesheet" type="text/css"
      href="http://{{domains[www1]}}:{{ports[http][0]}}/fetch/corb/resources/css-mislabeled-as-html-nosniff.css">

<body>
  <h1 id="header">Header example</h1>
  <p>Paragraph body</p>
</body>

<script>
test(() => {
  let style = getComputedStyle(document.getElementById('header'));
  const external_color = 'rgb(255, 0, 0)';  // red
  const default_color = 'rgb(0, 128, 0)';  // green
  assert_equals(style.getPropertyValue('color'), default_color);
  assert_not_equals(style.getPropertyValue('color'), external_color);
});
</script>
chromium/third_party/blink/web_tests/external/wpt/fetch/corb/style-css-mislabeled-as-html-nosniff.sub.html
