mirror of
https://github.com/servo/servo
synced 2026-05-03 12:52:25 +02:00
57 lines
2.6 KiB
HTML
57 lines
2.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" >
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<title>window.performance.now across frames</title>
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<link rel="author" title="Google" href="http://www.google.com/">
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<link rel="help" href="http://www.w3.org/TR/hr-time/#sec-extenstions-performance-interface">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script type="text/javascript">
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setup({explicit_done: true});
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function start_test() {
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setTimeout(function() {
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var iframe = document.createElement('iframe');
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iframe.id = 'frameContext';
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iframe.onload = finish_test;
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iframe.src = "resources/now_frame.html";
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document.body.appendChild(iframe);
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}, 1000);
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}
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function finish_test() {
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var childWindow = document.getElementById('frameContext').contentWindow;
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// Verify a positive number is returned for both the frame and parent.
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test(function() { assert_true(window.performance.now() > 0); }, 'parent performance.now() > 0');
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test(function() { assert_true(childWindow.performance.now() > 0); }, 'child performance.now() > 0');
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// Verify that the test properly created the child at least a second after the parent.
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test(function () { assert_true(childWindow.performance.timing.navigationStart > (window.performance.timing.navigationStart + 1000)); },
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'Child created at least 1 second after parent');
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test(function () {
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var parentNow = window.performance.now();
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var childNow = childWindow.performance.now();
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var childParentSkew = Math.abs(childNow - parentNow);
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assert_true(childParentSkew > 1000, 'Child and parent\'s now()s have different bases (skewed more than 1 second)');
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var childLoadTime = childWindow.performance.timing.loadEventStart - childWindow.performance.timing.navigationStart;
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assert_true(1000 > (childNow - childLoadTime), 'Child\'s now() is based on its document\'s navigationStart');
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}, 'Child and parent time bases are correct');
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done();
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}
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</script>
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</head>
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<body onload="start_test()">
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<h1>Description</h1>
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<p>This test validates the values of the window.performance.now() are based on the current document's navigationStart.</p>
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<div id="log"></div>
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</body>
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</html>
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