<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!DOCTYPE HTML> <html> <!-- Tests of DOM Worker Threads (Bug 437152) --> <head> <title>Test for DOM Worker Threads (Bug 437152)</title> <script src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=437152">DOM Worker Threads Bug 437152</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> const expectedErrorCount = 4; function messageListener(event) { ok(false, "Unexpected message: " + event.data); SimpleTest.finish(); }; var actualErrorCount = 0; var failedWorkers = []; function errorListener(event) { event.preventDefault(); if (failedWorkers.includes(event.target)) { ok(false, "Seen an extra error from this worker"); SimpleTest.finish(); return; } failedWorkers.push(event.target); actualErrorCount++; if (actualErrorCount == expectedErrorCount) { ok(true, "all errors correctly detected"); SimpleTest.finish(); } }; for (var i = 1; i <= expectedErrorCount; i++) { var worker = new Worker("threadErrors_worker" + i + ".js"); worker.onmessage = messageListener; worker.onerror = errorListener; worker.postMessage("Hi"); } SimpleTest.waitForExplicitFinish(); </script> </pre> </body> </html>