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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webmessaging/message-channels/detached-iframe.window.html - WPT Dashboard Interop Dashboard
// META: title=MessageChannel in a detached iframe test
// META: script=/service-workers/service-worker/resources/test-helpers.sub.js
// META: script=/common/gc.js
// Pull in the with_iframe helper function from the service worker tests
const IframeAction = {
REMOVE_BEFORE_CREATION: 'remove-before-creation',
REMOVE_AFTER_CREATION: 'remove-after-creation',
};
async function detached_frame_test(t, action) {
const iframe = await with_iframe('about:blank');
const iframe_MessageChannel = iframe.contentWindow.MessageChannel;
if (action === IframeAction.REMOVE_BEFORE_CREATION) {
iframe.remove();
}
(() => {
const mc = new iframe_MessageChannel();
mc.port1.postMessage("boo");
mc.port2.onmessage = t.unreached_func("message event received");
mc.port2.onmessageerror = t.unreached_func("message event received");
})();
if (action === IframeAction.REMOVE_AFTER_CREATION) {
iframe.remove();
}
await garbageCollect();
// We are testing that neither of the above two events fire. We assume that a 2 second timeout
// is good enough. We can't use any other API for an end condition because each MessagePort has
// its own independent port message queue, which has no ordering guarantees relative to other
// APIs.
await new Promise(resolve => t.step_timeout(resolve, 2000));
}
promise_test(async (t) => {
return detached_frame_test(t, IframeAction.REMOVE_AFTER_CREATION);
}, 'MessageChannel created from a detached iframe should not send messages (remove after create)');
promise_test(async (t) => {
return detached_frame_test(t, IframeAction.REMOVE_BEFORE_CREATION);
}, 'MessageChannel created from a detached iframe should not send messages (remove before create)');