Revision eaf80a57fa0feab78713bf35904b402b86266c84 authored by Navid Zolghadr on 20 March 2018, 17:08:44 UTC, committed by Navid Zolghadr on 20 March 2018, 17:08:44 UTC
1 parent 6e1b5f4
basic.any.js
test(function() {
assert_true((self.performance !== undefined), "self.performance exists");
assert_equals(typeof self.performance, "object", "self.performance is an object");
assert_equals((typeof self.performance.now), "function", "self.performance.now() is a function");
assert_equals(typeof self.performance.now(), "number", "self.performance.now() returns a number");
}, "self.performance.now() is a function that returns a number");
test(function() {
assert_true(self.performance.now() > 0);
}, "self.performance.now() returns a positive number");
test(function() {
var now1 = self.performance.now();
var now2 = self.performance.now();
assert_true((now2-now1) >= 0);
}, "self.performance.now() difference is not negative");
async_test(function() {
// Check whether the performance.now() method is close to Date() within 30ms (due to inaccuracies)
var initial_hrt = self.performance.now();
var initial_date = Date.now();
this.step_timeout(function() {
var final_hrt = self.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');
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