The problem I’ve found two main approaches when unit testing observables behavior in javascript: the marbles testing framework for comparing an observable to a mocked observable checking the observable directly controlling time with the Zone.js fakeAsync(). Check this great article from Victor Savkin about fakeAsync(). The Zone.js fakeAsync() intercepts the asynchronous javascript features allowing for control of time. So, observables … Continue reading Testing observable’s values when using Angular fakeAsync