| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Making the current page become non-active must prevent message transmission</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <!-- This is the entry global --> |
| |
| <iframe src="support/incumbent.html" id="incumbent"></iframe> |
| <iframe src="support/current.html" id="current"></iframe> |
| |
| <script> |
| "use strict"; |
| const incumbentIframe = document.querySelector("#incumbent"); |
| const currentIframe = document.querySelector("#current"); |
| |
| window.addEventListener("load", () => { |
| promise_test(async t => { |
| // This will invoke the constructor from currentIframe, but with incumbentIframe as the incumbent. |
| const messageChannel = incumbentIframe.contentWindow.createMessageChannel(); |
| |
| await new Promise((resolve, reject) => { |
| currentIframe.onload = () => resolve(); |
| currentIframe.onerror = () => reject(new Error("Could not navigate the iframe")); |
| currentIframe.src = "/common/blank.html"; |
| }); |
| |
| messageChannel.port1.onmessage = t.unreached_func("message event recieved"); |
| messageChannel.port1.onmessageerror = t.unreached_func("messageerror event recieved"); |
| messageChannel.port2.postMessage("boo"); |
| |
| // We are testing that neither of the above two events fire. We assume that a 3 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, 3000)); |
| }); |
| }); |
| </script> |