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Diffstat (limited to 'testing/web-platform/tests/hr-time/basic.html')
| -rw-r--r-- | testing/web-platform/tests/hr-time/basic.html | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/testing/web-platform/tests/hr-time/basic.html b/testing/web-platform/tests/hr-time/basic.html new file mode 100644 index 000000000..cc26d242f --- /dev/null +++ b/testing/web-platform/tests/hr-time/basic.html @@ -0,0 +1,47 @@ +<!DOCTYPE html> +<html> +<head> +<meta charset="utf-8" /> +<title>window.performance.now exists</title> +<link rel="author" title="W3C" href="http://www.w3.org/" /> +<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> +test(function() { + assert_equals(typeof window.performance, "object"); +}, "window.performance is defined", {assert: "The window.performance attribute provides a hosting area for performance related attributes."}); + +test(function() { + assert_not_equals(window.performance.now, undefined, 'window.performance.now is defined'); +}, "High Resolution Time extension to the Performance interface", {assert: "window.performance.now exists"}); + +test(function() { + assert_equals(typeof window.performance.now, "function", "window.performance.now is a function"); +}, "window.performance.now() function", {assert: "window.performance.now is a function"}); + +test(function() { + assert_equals(typeof window.performance.now(), "number", "window.performance.now() returns a number"); +}, "window.performance.now() returns a number", {assert: "The now method MUST return a DOMHighResTimeStamp"}); + +async_test(function() { + // Check whether the performance.now() method is close to Date() within 30ms (due to inaccuracies) + var initial_hrt = performance.now(); + var initial_date = Date.now(); + this.step_timeout(function() { + var final_hrt = performance.now(); + var final_date = Date.now(); + assert_approx_equals(final_hrt - initial_hrt, final_date - initial_date, 30, 'High resolution time value increased by approximately the same amount as time from date object'); + this.done(); + }, 2000); +}, 'High resolution time has approximately the right relative magnitude'); +</script> +</head> +<body> +<h1>Description</h1> +<p>This test validates that window.performance.now() exist and is a function.</p> + +<div id="log"></div> + +</body> +</html> |