i would like to ask you how can i test class that takes in constructor instance of another class. For example i want to test method 'hasChildRoutes()':

```
    class Route implements ng.route.IRoute {
    public url: string;
    public config: RouteConfig;

    constructor(url: string, config: RouteConfig) {
                this.url = url;
                this.config = config;
            }

    public hasChildRoutes(): boolean {
                return this.config.childRoutes.length > 0;
            }
}

```

i wrote bad unit test for this (im creating new instances of another classes which is bad in my opinion): 

```
 beforeEach(() => {
        routeSetting = new RouteSetting(1, '');
        routeConfig = new RouteConfig('', '', routeSetting, [], '');
    });

    describe('Methods test', () => {
        var childRoute: Route;

        beforeEach(() => {
            route = new Route('', routeConfig);
        });

        it('sould return false when Route has no child routes', () => {
            expect(route.hasChildRoutes()).toBeFalsy();
        });

        it('sould return true when Route has child routes', () => {
            routeConfig = new RouteConfig('', '', routeSetting, [route], '');
            route = new Route('', routeConfig);

            expect(route.hasChildRoutes()).toBeTruthy();
        });
    });

```