get all the keys of an object

Recursive Each.js

    it('should get all the keys of an object', function() {
        var selectedTile = { $$hashKey: 'testId', obj1:'test', obj2:5, obj3:{ test1:'test',test2:{a:1,b:2} } };
        var selectedTile2 = { $$hashKey: 'testId', obj1:'test', obj2:5, obj3:{ test1:'test' } };

        var keyList = [];            
        var recursiveEach = function(obj, customFunc) {
            // using recursive each because _.each/_.keys only gets first level properties
            for (var k in obj) {
                if (typeof obj[k] == "object" && obj[k] !== null){
                    customFunc(k);
                    recursiveEach(obj[k], customFunc);
                }
                else {
                    customFunc(k);
                }
            }
        };
        var pushKey = function(k) {
            keyList.push(k);
        };

        recursiveEach(selectedTile,pushKey);
        expect(true).toBe(true);
    });