scratch-vm/test/unit/timer.js
2016-04-26 09:54:14 -04:00

40 lines
867 B
JavaScript

var test = require('tap').test;
var Timer = require('../../src/util/timer');
test('spec', function (t) {
var timer = new Timer();
t.type(Timer, 'function');
t.type(timer, 'object');
t.type(timer.startTime, 'number');
t.type(timer.time, 'function');
t.type(timer.start, 'function');
t.type(timer.stop, 'function');
t.end();
});
test('time', function (t) {
var timer = new Timer();
var time = timer.time();
t.ok(Date.now() >= time);
t.end();
});
test('start / stop', function (t) {
var timer = new Timer();
var delay = 100;
var threshold = 1000 / 60; // 60 hz
// Start timer
timer.start();
// Wait and stop timer
setTimeout(function () {
var stop = timer.stop();
t.ok(stop >= -(delay + threshold) && stop <= -(delay - threshold));
t.end();
}, delay);
});