Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html 

<!DOCTYPE HTML>
<title>object setCustomValidity</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<object id='object_test'></object>

<script>

test(() => {
  let elem = document.getElementById("object_test");
  assert_false(elem.validity.customError);
  elem.setCustomValidity("custom error");
  assert_true(elem.validity.customError);
}, "object setCustomValidity is correct")

</script>