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Side by Side Diff: third_party/WebKit/LayoutTests/fast/events/hr-timestamp/safe-resolution.html

Issue 2744553007: Upstream high resolution event timestamp tests to WPT (Closed)
Patch Set: Make WPT lint happy Created 3 years, 5 months ago
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1 <!DOCTYPE html>
2
3 <script src="../../../resources/testharness.js"></script>
4 <script src="../../../resources/testharnessreport.js"></script>
5 <script type="text/javascript">
6 'use strict';
7
8 test(function() {
9 let e1 = new MouseEvent('test1');
10 let e2 = new MouseEvent('test2');
11
12 while (e1.timeStamp == e2.timeStamp)
13 e2 = new MouseEvent('test2');
14
15 let expectedResolutionMilliseconds = 0.005;
16 let integerMultipleOfResolution = (e2.timeStamp - e1.timeStamp) / expectedRe solutionMilliseconds;
17 let shouldBeNearZeroOrOne = integerMultipleOfResolution % 1;
18 assert_true(shouldBeNearZeroOrOne < 1e-10 || Math.abs(shouldBeNearZeroOrOne - 1) < 1e-10);
19 }, 'Event timestamp should not have a resolution better that 5 microseconds');
20 </script>
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