chromium/third_party/blink/web_tests/external/wpt/html/semantics/forms/form-control-infrastructure/association.window.js

test(() => {
  const form = document.createElement("form"),
        input = document.createElement("input");

  form.appendChild(input);
  assert_equals(input.form, form);
}, "Ensure input and form get associated when not in a document");