third_party/WebKit/LayoutTests/imported/web-platform-tests/hr-time/basic.html - Issue 1985333002: Move the hr-time directory from web-platform-tests/ to wpt/.

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Issue 1985333002: Move the hr-time directory from web-platform-tests/ to wpt/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Rebased Created 4 years, 7 months ago

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1 <!DOCTYPE html>

2 <html>

3 <head>

4 <meta charset="utf-8" />

5 <title>window.performance.now exists</title>

6 <link rel="author" title="W3C" href="http://www.w3.org/" />

7 <link rel="help" href="http://www.w3.org/TR/hr-time/#sec-extenstions-performance -interface"/>

8 <script src="../../../resources/testharness.js"></script>

9 <script src="../../../resources/testharnessreport.js"></script>

10 <script>

11 test(function() {

12 assert_equals(typeof window.performance, "object");

13 }, "window.performance is defined", {assert: "The window.performance attribute p rovides a hosting area for performance related attributes."});

14

15 test(function() {

16 assert_not_equals(window.performance.now, undefined, 'window.performance.now i s defined');

17 }, "High Resolution Time extension to the Performance interface", {assert: "wind ow.performance.now exists"});

18

19 test(function() {

20 assert_equals(typeof window.performance.now, "function", "window.performance.n ow is a function");

21 }, "window.performance.now() function", {assert: "window.performance.now is a fu nction"});

22

23 test(function() {

24 assert_equals(typeof window.performance.now(), "number", "window.performance.n ow() returns a number");

25 }, "window.performance.now() returns a number", {assert: "The now method MUST re turn a DOMHighResTimeStamp"});

26

27 async_test(function() {

28 // Check whether the performance.now() method is close to Date() within 30ms ( due to inaccuracies)

29 var initial_hrt = performance.now();

30 var initial_date = Date.now();

31 setTimeout(this.step_func(function() {

32 var final_hrt = performance.now();

33 var final_date = Date.now();

34 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');

35 this.done();

36 }), 2000);

37 }, 'High resolution time has approximately the right relative magnitude');

38 </script>

39 </head>

40 <body>

41 <h1>Description</h1>

42 <p>This test validates that window.performance.now() exist and is a function.</p >

43

44 <div id="log"></div>

45

46 </body>

47 </html>

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