test_cross_frame_start.html (2746B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8" > 5 <title>window.performance.now across frames</title> 6 <link rel="author" title="Google" href="http://www.google.com/"> 7 <link rel="help" href="http://www.w3.org/TR/hr-time/#sec-extenstions-performance-interface"> 8 9 <script src="/resources/testharness.js"></script> 10 <script src="/resources/testharnessreport.js"></script> 11 12 <script type="text/javascript"> 13 setup({explicit_done: true}); 14 15 var setup_frame = async_test("Setup the frame"); 16 17 function start_test() { 18 setup_frame.step_timeout(function () { 19 var iframe = document.createElement('iframe'); 20 iframe.id = 'frameContext'; 21 iframe.onload = finish_test; 22 iframe.src = "resources/now_frame.html"; 23 document.body.appendChild(iframe); 24 setup_frame.done(); 25 }, 1000); 26 } 27 28 function finish_test() { 29 var childWindow = document.getElementById('frameContext').contentWindow; 30 31 // Verify a positive number is returned for both the frame and parent. 32 test(function() { assert_true(window.performance.now() > 0); }, 'parent performance.now() > 0'); 33 test(function() { assert_true(childWindow.performance.now() > 0); }, 'child performance.now() > 0'); 34 35 // Verify that the test properly created the child at least a second after the parent. 36 test(function () { assert_true(childWindow.performance.timing.navigationStart > (window.performance.timing.navigationStart + 1000)); }, 37 'Child created at least 1 second after parent'); 38 39 test(function () { 40 var parentNow = window.performance.now(); 41 var childNow = childWindow.performance.now(); 42 var childParentSkew = Math.abs(childNow - parentNow); 43 assert_true(childParentSkew > 1000, 'Child and parent\'s now()s have different bases (skewed more than 1 second)'); 44 45 var childLoadTime = childWindow.performance.timing.loadEventStart - childWindow.performance.timing.navigationStart; 46 assert_true(1000 > (childNow - childLoadTime), 'Child\'s now() is based on its document\'s navigationStart'); 47 }, 'Child and parent time bases are correct'); 48 49 done(); 50 } 51 </script> 52 53 </head> 54 <body onload="start_test()"> 55 <h1>Description</h1> 56 <p>This test validates the values of the window.performance.now() are based on the current document's navigationStart.</p> 57 <div id="log"></div> 58 </body> 59 </html>