EventListener-handleEvent-cross-realm.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Cross-realm EventListener throws TypeError of its associated Realm</title>
<link rel="help" href="https://webidl.spec.whatwg.org/#ref-for-prepare-to-run-script">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<iframe name="eventListenerGlobalObject" src="resources/empty-document.html"></iframe>

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

test_onload(() => {
    const eventTarget = new EventTarget;
    const eventListener = new eventListenerGlobalObject.Object;

    eventTarget.addEventListener("foo", eventListener);
    assert_reports_exception(eventListenerGlobalObject.TypeError, () => { eventTarget.dispatchEvent(new Event("foo")); });
}, "EventListener is cross-realm plain object without 'handleEvent' property");

test_onload(() => {
    const eventTarget = new EventTarget;
    const eventListener = new eventListenerGlobalObject.Object;
    eventListener.handleEvent = {};

    eventTarget.addEventListener("foo", eventListener);
    assert_reports_exception(eventListenerGlobalObject.TypeError, () => { eventTarget.dispatchEvent(new Event("foo")); });
}, "EventListener is cross-realm plain object with non-callable 'handleEvent' property");

test_onload(() => {
    const eventTarget = new EventTarget;
    const { proxy, revoke } = Proxy.revocable(() => {}, {});
    revoke();

    const eventListener = new eventListenerGlobalObject.Object;
    eventListener.handleEvent = proxy;

    eventTarget.addEventListener("foo", eventListener);
    assert_reports_exception(eventListenerGlobalObject.TypeError, () => { eventTarget.dispatchEvent(new Event("foo")); });
}, "EventListener is cross-realm plain object with revoked Proxy as 'handleEvent' property");

test_onload(() => {
    const eventTarget = new EventTarget;
    const { proxy, revoke } = eventListenerGlobalObject.Proxy.revocable({}, {});
    revoke();

    eventTarget.addEventListener("foo", proxy);
    assert_reports_exception(eventListenerGlobalObject.TypeError, () => { eventTarget.dispatchEvent(new Event("foo")); });
}, "EventListener is cross-realm non-callable revoked Proxy");

test_onload(() => {
    const eventTarget = new EventTarget;
    const { proxy, revoke } = eventListenerGlobalObject.Proxy.revocable(() => {}, {});
    revoke();

    eventTarget.addEventListener("foo", proxy);
    assert_reports_exception(eventListenerGlobalObject.TypeError, () => { eventTarget.dispatchEvent(new Event("foo")); });
}, "EventListener is cross-realm callable revoked Proxy");

function test_onload(fn, desc) {
    async_test(t => { window.addEventListener("load", t.step_func_done(fn)); }, desc);
}

function assert_reports_exception(expectedConstructor, fn) {
    let error;
    const onErrorHandler = event => { error = event.error; };

    eventListenerGlobalObject.addEventListener("error", onErrorHandler);
    fn();
    eventListenerGlobalObject.removeEventListener("error", onErrorHandler);

    assert_equals(typeof error, "object");
    assert_equals(error.constructor, expectedConstructor);
}
</script>
chromium/third_party/blink/web_tests/external/wpt/dom/events/EventListener-handleEvent-cross-realm.html
