| // 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)'); |