promise-job-incumbent.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<title>Incumbent settings object for promise jobs</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

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

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

<script>
setup({ explicit_done: true });

// postMessage should pick the incumbent page as its .source value to set on the MessageEvent, even
// inside promise jobs.
const expectedURL = (new URL("resources/promise-job-incumbent-incumbent.html", location.href)).href;

let testId = 0;

window.onload = () => {
  const relevantWindow = frames[0].document.querySelector("#r").contentWindow;
  const runInResolver = frames[1].runWhatYouGiveMe;

  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 with no promises involved");

  async_test(t => {
    const thisTestId = setupTest(t);

    // No t.step_func because that could change the realms
    Promise.resolve().then(() => {
      frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");
    });
  }, "Fulfillment handler on fulfilled promise");

  async_test(t => {
    const thisTestId = setupTest(t);

    const p = Promise.resolve();
    frames[0].runWindowPostMessageVeryIndirectlyWithNoUserCode(p, "then", thisTestId, "*");
  }, "Fulfillment handler on fulfilled promise, using backup incumbent settings object stack");

  async_test(t => {
    const thisTestId = setupTest(t);

    // No t.step_func because that could change the realms
    Promise.reject().catch(() => {
      frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");
    });
  }, "Rejection handler on rejected promise");

  async_test(t => {
    const thisTestId = setupTest(t);

    const p = Promise.reject();
    frames[0].runWindowPostMessageVeryIndirectlyWithNoUserCode(p, "catch", thisTestId, "*");
  }, "Rejection handler on rejected promise, using backup incumbent settings object stack");

  // The following tests test that we derive the incumbent settings object at promise-job time from
  // the incumbent realm at the time the handler was added, not at the time the resolve()/reject()
  // was done. See https://github.com/whatwg/html/issues/5213 for the spec side of this issue.

  async_test(t => {
    const thisTestId = setupTest(t);

    let resolve;
    const p = new Promise(r => { resolve = r; });

    // No t.step_func because that could change the realms
    p.then(() => {
      frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");
    });

    t.step_timeout(() => {
      runInResolver(resolve);
    }, 0);
  }, "Fulfillment handler on pending-then-fulfilled promise");

  async_test(t => {
    const thisTestId = setupTest(t);

    let resolve;
    const p = new Promise(r => { resolve = r; });

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

    t.step_timeout(() => {
      runInResolver(resolve);
    }, 0);
  }, "Fulfillment handler on pending-then-fulfilled promise, using backup incumbent settings object stack");

  async_test(t => {
    const thisTestId = setupTest(t);

    let reject;
    const p = new Promise((_, r) => { reject = r; });

    // No t.step_func because that could change the realms
    p.catch(() => {
      frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");
    });

    t.step_timeout(() => {
      runInResolver(reject);
    }, 0);
  }, "Rejection handler on pending-then-rejected promise");

  async_test(t => {
    const thisTestId = setupTest(t);

    let reject;
    const p = new Promise((_, r) => { reject = r; });

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

    t.step_timeout(() => {
      runInResolver(reject);
    }, 0);
  }, "Rejection handler on pending-then-rejected promise, using backup incumbent settings object stack");

  async_test(t => {
    const thisTestId = setupTest(t);

    const thenable = {
      // No t.step_func because that could change the realms
      then(f) {
        frames[0].runWindowPostMessageVeryIndirectly(thisTestId, "*");
      }
    };

    Promise.resolve(thenable);
  }, "Thenable resolution");

  async_test(t => {
    const thisTestId = setupTest(t);

    frames[0].resolveThenableThatRunsWindowPostMessageVeryIndirectlyWithNoUserCode(testId, "*", []);
  }, "Thenable resolution, using backup incumbent settings object stack");

  done();
};
</script>
chromium/third_party/blink/web_tests/external/wpt/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-incumbent.html
