chromium/third_party/blink/web_tests/external/wpt/css/selectors/focus-visible-023.html

<!DOCTYPE html>
<meta charset="utf-8" />
<title>CSS Test (Selectors): Element doesn't match :focus-visiblel after blur</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<style>
  :focus-visible {
    outline: green solid 5px;
  }
</style>

<div id="target" tabindex="0">Target</div>
<script>
  // Check that :focus-visible is supported.
  test_valid_selector(':focus-visible');

  async_test(function(t) {
    target.addEventListener("focus", t.step_func(function() {
      assert_equals(getComputedStyle(target).outlineStyle, "solid", `outline-style for ${target.tagName}#${target.id} should be solid`);
      assert_equals(getComputedStyle(target).outlineColor, "rgb(0, 128, 0)", `outlineColor for ${target.tagName}#${target.id} should be green`);
      target.blur();
    }));
    target.addEventListener("blur", t.step_func(function() {
      assert_equals(getComputedStyle(target).outlineStyle, "none", `outline-style for ${target.tagName}#${target.id} should be none`);
      t.done();
    }));
    target.focus();
  }, ":focus-visible stop matching after blur");
</script>