SharedWorkerPerformanceNow.html (2048B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <title>window.performance.now in shared workers</title> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 </head> 8 <body> 9 <script> 10 async_test(function(t) { 11 const worker = new SharedWorker('support/WorkerSendingPerformanceNow.js'); 12 worker.port.onmessage = t.step_func(event => { 13 const results = event.data; 14 assert_equals(results.length, 4); 15 assert_equals(results[0], 'undefined', 16 'workerStart not defined on the Worker object'); 17 assert_equals(results[1], 'object', 'self.performance is defined'); 18 assert_equals(results[2], 'function', 'self.performance.now is defined'); 19 assert_greater_than(results[3], 0, 'Time in the worker should be positive'); 20 assert_greater_than(window.performance.now(), results[3], 'Time in the worker should be before the current time in the main document'); 21 setupIframe(); 22 }); 23 window.iframeStartTime = 0; 24 window.test_iframe = function(event) { 25 const workerTime = event.data[3]; 26 assert_greater_than(workerTime, window.iframeStartTime, 27 'Time since origin time should be greater in the shared worker than the iframe'); 28 t.done(); 29 } 30 function setupIframe() { 31 const iframe = document.createElement('iframe'); 32 document.body.appendChild(iframe); 33 const script = iframe.contentWindow.document.createElement('script'); 34 script.innerHTML = 35 'window.top.iframeStartTime = window.performance.now();' + 36 'const worker = new SharedWorker("support/WorkerSendingPerformanceNow.js");' + 37 'worker.port.onmessage = function(event) {' + 38 ' window.top.test_iframe(event);' + 39 '};' + 40 'worker.port.postMessage("");'; 41 iframe.contentWindow.document.body.appendChild(script); 42 } 43 worker.port.postMessage(''); 44 }, 'performance.now() exists in shared workers and reports reasonable times'); 45 </script> 46 </body> 47 </html>