incumbent.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /wasm/jsapi/functions/incumbent.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Incumbent settings object for host functions</title>

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

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

<!-- This is the entry page. -->

<iframe src="resources/incumbent-incumbent.html"></iframe>

<script>

setup({ explicit_done: true });

// postMessage should pick the incumbent page as its .source value to set on the MessageEvent, even

// inside host functions.

const expectedURL = (new URL("resources/incumbent-incumbent.html", location.href)).href;

let testId = 0;

window.onload = () => {

  const relevantWindow = frames[0].document.querySelector("#r").contentWindow;

  function setupTest(t) {

    ++testId;

    const thisTestId = testId;

    relevantWindow.addEventListener("messagereceived", t.step_func(e => {

      const [receivedTestId, receivedSourceURL] = e.detail;

      if (receivedTestId !== thisTestId) {

        return;

      assert_equals(receivedSourceURL, expectedURL);

      t.done();

    }));

    return thisTestId;

  async_test(t => {

    const thisTestId = setupTest(t);

    frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");

  }, "Sanity check: this all works as expected synchronously");

  async_test(t => {

    const thisTestId = setupTest(t);

    frames[0].runWindowPostMessageVeryIndirectlyWithNoUserCode(thisTestId, "*");

  }, "Start function");

  done();

};

</script>