selectedcontent-parser-removal-script-runs-once.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/the-select-element/customizable-select/selectedcontent-parser-removal-script-runs-once.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Parser-initiated option removal doesn't clone a not-yet-run script into selectedcontent</title>

<link rel=help href="https://html.spec.whatwg.org/#the-option-element:stack-of-open-elements">

<link rel=help href="https://html.spec.whatwg.org/#adoption-agency-algorithm">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script>

  window.runs = 0;

</script>

<select>

  <button><selectedcontent></selectedcontent></button>

  <b><div><option selected>one</option></b></div>

  <option selected><script>runs++</script><span>two</span></option>

</select>

<script>

  test(() => {

    assert_equals(document.querySelector("select div").parentNode,

                  document.querySelector("select"),

                  "The adoption agency algorithm should have moved the div");

    assert_equals(runs, 1, "Script should run exactly once");

    assert_equals(document.querySelector("selectedcontent span")?.textContent, "two",

                  "selectedcontent should contain the selected option");

  }, "An option removed by the parser doesn't cause a not-yet-run script in a selected option to be cloned");

</script>