css/cssom/getComputedStyle-pseudo-with-argument.html

<!doctype html>
<meta charset="utf-8">
<title>CSSOM: Handling pseudo-elements with arguments</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<link rel=help href=https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle>
<style>
#pseudo-invalid::highlight(name) {
  color: rgb(0, 128, 0);
}
#pseudo-invalid::view-transition-image-pair(name) {
  color: rgb(0, 128, 0);
}
#pseudo-invalid::view-transition-group(name) {
  color: rgb(0, 128, 0);
}
#pseudo-invalid::view-transition-old(name) {
  color: rgb(0, 128, 0);
}
#pseudo-invalid::view-transition-new(name) {
  color: rgb(0, 128, 0);
}
</style>
<ul><li id="pseudo-invalid">Item</li></ul>
<script>
[
  "::before(test)",
  "::highlight",
  "::highlight(",
  "::highlight()",
  "::highlight(1)",
  "::highlight($)",
  "::highlight (name)",
  "::highlight(name)a",
  ":highlight(name)",
  "::view-transition-group(*)",
  "::view-transition-image-pair(*)",
  "::view-transition-old(*)",
  "::view-transition-new(*)",
  ":view-transition-group(name)",
  ":view-transition-image-pair(name)",
  ":view-transition-old(name)",
  ":view-transition-new(name)",
].forEach(nonParsablePseudoIdentifier => {
  test(() => {
    const li = document.querySelector('li');
    assert_equals(getComputedStyle(li, nonParsablePseudoIdentifier).length, 0);
  }, `This pseudo-element should not parse: ${nonParsablePseudoIdentifier}`)
});

[
  "::highlight(name)",
  "::highlight(\nname",
  "::highlight(name\t",
  "::highlight( name ",
  "::highlight( n\\61me )"
].forEach(parsablePseudoIdentifier => {
  test(() => {
    const li = document.querySelector('li');
    assert_true(getComputedStyle(li, parsablePseudoIdentifier).length != 0);
    assert_equals(getComputedStyle(li, parsablePseudoIdentifier).color, "rgb(0, 128, 0)");
  }, `This pseudo-element should parse: ${parsablePseudoIdentifier}`);
});
</script>