Qunit test of ko observable array after a (mocked) ajax call

qunittest.js

module("module", {
    setup: function () {
        $.mockjax( {
            url: "*",
            responseTime: 1,
            dataType: 'text/json',
            responseText: [{'name' : 'wally'},{ "name":"molly" }]
        });
    },
    teardown: function () {
        $.mockjaxClear();
    }
});

test("Test ko observable array after ajax call", function(){

    var impl = new MockClass();

    ko.applyBindings(impl);

    impl.add([{'name' : 'wally'}]);

    stop();

    impl.get();

    setTimeout(function()
    {
        ok(impl.collect().length == 2);
        start();

    }, 100);

    });

var MockClass = function(){
    var self = this;

    self.collect = ko.observableArray([]);

    self.add = function(data){
      self.collect.push(data);
    };

    self.get = function()
    {
        $.getJSON( 'goingnowhere', function(data){
            self.add(data);
        });
    };
};