2012-04-27 00:22:06 -07:00
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test for High Resolution Timer</title>
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<script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<script>
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2012-05-07 08:44:26 -07:00
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ok(window.performance, "Performance object should exist.");
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ok(typeof window.performance.now == 'function', "Performance object should have a 'now' method.");
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var n = window.performance.now(), d = Date.now();
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ok(n >= 0, "The value of now() should be equal to or greater than 0.");
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ok(window.performance.now() >= n, "The value of now() should monotonically increase.");
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2012-04-27 00:22:06 -07:00
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SimpleTest.waitForExplicitFinish();
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2012-05-07 08:44:26 -07:00
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var checks = 0;
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function checkAfterTimeout() {
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checks++;
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var d2 = Date.now();
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// Timeouts aren't extremely reliable and especially on Windows we are prone to fallback to
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// millisecond timers, in which case this test might occasionally fail. This is a workaround:
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if (navigator.platform.indexOf("Win") == 0 &&
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window.performance.now() == n && d == d2 &&
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checks < 5) {
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setTimeout(checkAfterTimeout, 20);
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return;
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}
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ok(window.performance.now() > n, "After a timeout, the value of now() should be strictly greater than before.");
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2012-04-27 00:22:06 -07:00
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SimpleTest.finish();
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2012-05-07 08:44:26 -07:00
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};
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setTimeout(checkAfterTimeout, 20);
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2012-04-27 00:22:06 -07:00
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</script>
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</body>
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</html>
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