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<!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>
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