chromium/third_party/blink/web_tests/fast/html/unused-link-rel-expect-warning.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <script src="../../resources/js-test.js"></script>
  <link rel="expect" href="#non-existent" blocking="render">
</head>
<script>
  window.jsTestIsAsync = true;
  description("Unused <link rel=expect> should generate a console warning");
  setTimeout(() => {
    if (window.testRunner) {
      testRunner.dumpAsText();
    }
    finishJSTest();
  });
</script>

</html>