HttpClient is the preferred way to make http calls from an Angular app. It is simple and straightforward to use, returning an Observable<T>. All you have to do is subscribe and the callback will be invoked when the data comes back from the server. via GIPHY But what about error handling? In a perfect world, … [Read more…]
There’s several tutorials for how to use and test HttpClient, but I wanted to distill it down to a simple snippet that I can refer back to when I inevitably forget how to do it. via GIPHY HttpTestingController This handy thing is provided by importing the HttpClientTestingModule in to your TestBed. It lets you manipulate … [Read more…]
Say that you created a service that essentially wraps Angular’s HttpClient calls: And say that you called that in a component: And now you want to test the Get function to make sure that myValue is set to the value returned by the service. If you try to create a spy on the function in … [Read more…]