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/* globals jasmine */
/**
* Jasmine RequestAnimationFrame: a set of helpers for testing functionality
* that uses requestAnimationFrame under the Jasmine BDD framework for JavaScript.
*/
function RAFPlugin(jasmine) {
var index = 0
var callbacks = []
function MockRAF() {
this.nextTime = 0
var _this = this
/**
* Mock for window.requestAnimationFrame
*/
this.mockRAF = function (fn) {
if (typeof fn !== 'function') {
throw new Error('You should pass a function to requestAnimationFrame')
}
const i = index++
callbacks[i] = fn
return i
}
/**
* Mock for window.cancelAnimationFrame
*/
this.mockCAF = function (requestID) {
callbacks.splice(requestID, 1)
}
this.mockPerf = {
now: function () {
return _this.nextTime
}
}
/**
* Install request animation frame mocks.
*/
this.install = function (global) {
_this.realRAF = global.requestAnimationFrame
_this.realCAF = global.cancelAnimationFrame
_this.realPerf = global.performance
global.requestAnimationFrame = _this.mockRAF
global.cancelAnimationFrame = _this.mockCAF
global.performance = _this.mockPerf
}
/**
* Uninstall request animation frame mocks.
*/
this.uninstall = function (global) {
global.requestAnimationFrame = _this.realRAF
global.cancelAnimationFrame = _this.realCAF
global.performance = _this.realPerf
_this.nextTime = 0
callbacks = []
}
/**
* Simulate animation frame readiness.
*/
this.tick = function (dt) {
_this.nextTime += dt || 1
var fns = callbacks
var fn
var i
callbacks = []
index = 0
for (i in fns) {
fn = fns[i]
fn(_this.nextTime)
}
}
}
jasmine.RequestAnimationFrame = new MockRAF()
}
RAFPlugin(jasmine)
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