spec-js/schedulers/AnimationFrameScheduler-spec.js

"use strict";
var chai_1 = require('chai');
var sinon = require('sinon');
var Rx = require('../../dist/package/Rx');
var animationFrame = Rx.Scheduler.animationFrame;
/** @test {Scheduler} */
describe('Scheduler.animationFrame', function () {
    it('should exist', function () {
        chai_1.expect(animationFrame).exist;
    });
    it('should act like the async scheduler if delay > 0', function () {
        var actionHappened = false;
        var sandbox = sinon.sandbox.create();
        var fakeTimer = sandbox.useFakeTimers();
        animationFrame.schedule(function () {
            actionHappened = true;
        }, 50);
        chai_1.expect(actionHappened).to.be.false;
        fakeTimer.tick(25);
        chai_1.expect(actionHappened).to.be.false;
        fakeTimer.tick(25);
        chai_1.expect(actionHappened).to.be.true;
        sandbox.restore();
    });
    it('should cancel animationFrame actions when delay > 0', function () {
        var actionHappened = false;
        var sandbox = sinon.sandbox.create();
        var fakeTimer = sandbox.useFakeTimers();
        animationFrame.schedule(function () {
            actionHappened = true;
        }, 50).unsubscribe();
        chai_1.expect(actionHappened).to.be.false;
        fakeTimer.tick(25);
        chai_1.expect(actionHappened).to.be.false;
        fakeTimer.tick(25);
        chai_1.expect(actionHappened).to.be.false;
        sandbox.restore();
    });
    it('should schedule an action to happen later', function (done) {
        var actionHappened = false;
        animationFrame.schedule(function () {
            actionHappened = true;
            done();
        });
        if (actionHappened) {
            done(new Error('Scheduled action happened synchronously'));
        }
    });
    it('should execute recursively scheduled actions in separate asynchronous contexts', function (done) {
        var syncExec1 = true;
        var syncExec2 = true;
        animationFrame.schedule(function (index) {
            if (index === 0) {
                this.schedule(1);
                animationFrame.schedule(function () { syncExec1 = false; });
            }
            else if (index === 1) {
                this.schedule(2);
                animationFrame.schedule(function () { syncExec2 = false; });
            }
            else if (index === 2) {
                this.schedule(3);
            }
            else if (index === 3) {
                if (!syncExec1 && !syncExec2) {
                    done();
                }
                else {
                    done(new Error('Execution happened synchronously.'));
                }
            }
        }, 0, 0);
    });
    it('should cancel the animation frame if all scheduled actions unsubscribe before it executes', function (done) {
        var animationFrameExec1 = false;
        var animationFrameExec2 = false;
        var action1 = animationFrame.schedule(function () { animationFrameExec1 = true; });
        var action2 = animationFrame.schedule(function () { animationFrameExec2 = true; });
        chai_1.expect(animationFrame.scheduled).to.exist;
        chai_1.expect(animationFrame.actions.length).to.equal(2);
        action1.unsubscribe();
        action2.unsubscribe();
        chai_1.expect(animationFrame.actions.length).to.equal(0);
        chai_1.expect(animationFrame.scheduled).to.equal(undefined);
        animationFrame.schedule(function () {
            chai_1.expect(animationFrameExec1).to.equal(false);
            chai_1.expect(animationFrameExec2).to.equal(false);
            done();
        });
    });
    it('should execute the rest of the scheduled actions if the first action is canceled', function (done) {
        var actionHappened = false;
        var firstSubscription = null;
        var secondSubscription = null;
        firstSubscription = animationFrame.schedule(function () {
            actionHappened = true;
            if (secondSubscription) {
                secondSubscription.unsubscribe();
            }
            done(new Error('The first action should not have executed.'));
        });
        secondSubscription = animationFrame.schedule(function () {
            if (!actionHappened) {
                done();
            }
        });
        if (actionHappened) {
            done(new Error('Scheduled action happened synchronously'));
        }
        else {
            firstSubscription.unsubscribe();
        }
    });
});
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