messageport-current.html (1639B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>Making the current page become non-active must prevent message transmission</title> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 7 <!-- This is the entry global --> 8 9 <iframe src="support/incumbent.html" id="incumbent"></iframe> 10 <iframe src="support/current.html" id="current"></iframe> 11 12 <script> 13 "use strict"; 14 const incumbentIframe = document.querySelector("#incumbent"); 15 const currentIframe = document.querySelector("#current"); 16 17 window.addEventListener("load", () => { 18 promise_test(async t => { 19 // This will invoke the constructor from currentIframe, but with incumbentIframe as the incumbent. 20 const messageChannel = incumbentIframe.contentWindow.createMessageChannel(); 21 22 await new Promise((resolve, reject) => { 23 currentIframe.onload = () => resolve(); 24 currentIframe.onerror = () => reject(new Error("Could not navigate the iframe")); 25 currentIframe.src = "/common/blank.html"; 26 }); 27 28 messageChannel.port1.onmessage = t.unreached_func("message event recieved"); 29 messageChannel.port1.onmessageerror = t.unreached_func("messageerror event recieved"); 30 messageChannel.port2.postMessage("boo"); 31 32 // We are testing that neither of the above two events fire. We assume that a 3 second timeout 33 // is good enough. We can't use any other API for an end condition because each MessagePort has 34 // its own independent port message queue, which has no ordering guarantees relative to other 35 // APIs. 36 await new Promise(resolve => t.step_timeout(resolve, 3000)); 37 }); 38 }); 39 </script>