Fake timer example

faketimer.js

{
    setUp: function () {
        this.clock = sinon.useFakeTimers();
    },

    tearDown: function () {
        this.clock.restore();
    },

    describe('Deve usar um timmer de 510ms fixo', (assert) => {
        var el = jQuery("<div></div>");
        el.appendTo(document.body);

        el.animate({ height: "200px", width: "200px" });
        this.clock.tick(510);

        assertEquals("200px", el.css("height"));
        assertEquals("200px", el.css("width"));
    })
}