| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8" > |
| <title>window.performance.now across frames</title> |
| <link rel="author" title="Google" href="http://www.google.com/"> |
| <link rel="help" href="http://www.w3.org/TR/hr-time/#sec-extenstions-performance-interface"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script type="text/javascript"> |
| setup({explicit_done: true}); |
| |
| function start_test() { |
| setTimeout(function() { |
| var iframe = document.createElement('iframe'); |
| iframe.id = 'frameContext'; |
| iframe.onload = finish_test; |
| iframe.src = "resources/now_frame.html"; |
| document.body.appendChild(iframe); |
| }, 1000); |
| } |
| |
| function finish_test() { |
| var childWindow = document.getElementById('frameContext').contentWindow; |
| |
| // Verify a positive number is returned for both the frame and parent. |
| test(function() { assert_true(window.performance.now() > 0); }, 'parent performance.now() > 0'); |
| test(function() { assert_true(childWindow.performance.now() > 0); }, 'child performance.now() > 0'); |
| |
| // Verify that the test properly created the child at least a second after the parent. |
| test(function () { assert_true(childWindow.performance.timing.navigationStart > (window.performance.timing.navigationStart + 1000)); }, |
| 'Child created at least 1 second after parent'); |
| |
| test(function () { |
| var parentNow = window.performance.now(); |
| var childNow = childWindow.performance.now(); |
| var childParentSkew = Math.abs(childNow - parentNow); |
| assert_true(childParentSkew > 1000, 'Child and parent\'s now()s have different bases (skewed more than 1 second)'); |
| |
| var childLoadTime = childWindow.performance.timing.loadEventStart - childWindow.performance.timing.navigationStart; |
| assert_true(1000 > (childNow - childLoadTime), 'Child\'s now() is based on its document\'s navigationStart'); |
| }, 'Child and parent time bases are correct'); |
| |
| done(); |
| } |
| </script> |
| |
| </head> |
| <body onload="start_test()"> |
| <h1>Description</h1> |
| <p>This test validates the values of the window.performance.now() are based on the current document's navigationStart.</p> |
| <div id="log"></div> |
| </body> |
| </html> |
