Sometimes there’s a path in a service or application that you want to test where all it does is log something and return. You could check other things, but sometimes it is hard to check to see if something didn’t happen… and it would be a lot easier to know if something did happen, like … [Read more…]
Last week I wrote about bit fields and how they can be used to easily track boolean values. Unit testing is pretty important to me, because I make mistakes a lot. By writing tests, I can have a little bit of confidence in the code that I wrote. via GIPHY Bit Fields Knowing how bit … [Read more…]
C# has a Stopwatch class that is pretty accurate at timing things. In fact, it uses some low-level operating system stuff to make sure to get exact timings. This means it can be more accurate than comparing two different DateTime.Now instances. via GIPHY I’ve found myself using the Stopwatch occasionally, but it always is kind … [Read more…]
Imagine that you have a NuGet package containing a bunch of static strings. These fields are intended to be used instead of magic strings, making it so anything that takes a dependency on this NuGet package will all be on the same page about these unique keys. Now suppose that these keys also represent the … [Read more…]
Last week I wrote about how to upload a file from a website using Angular and .NET Core. Writing tests for this is mostly straightforward, but there’s a few gotchas that I thought I would write down for the next time I need to do this. The front end tests are pretty trivial – you … [Read more…]
So there I am, happily writing unit tests, and suddenly this appears I keep seeing this error while trying to write Angular tests. I… *think* this happens when something goes wrong during the constructor of a component. I’ve written before about how it could be due to an @Input property not being initialized properly. But, … [Read more…]
Are you tired of feeling like your code is meaningless? Sick of people not referring to your code as “black magic,” or struggling to gain recognition from your boss for writing sufficiently obfuscated code?If you’ve answered “yes” to any of the above, Reflection might be for you! via GIPHY Reflection I’ve talked about reflection a … [Read more…]
In the last blog post I showed how you could extend NgbModal to make a Modal Service, letting you re-use modal dialogs easily from within your Angular components. Even though its not always that much fun, I like to try and keep testability in mind when writing code… and, I’ll admit it, sometimes I gloss … [Read more…]
In a previous post I talked about how to use Observable.throw to simulate an Observable error in a unit test. However, in RxJS 6, the syntax changed a bit. I also talked about this a bit in this post about using of to create Observables on the fly for testing in RxJS 6, but I … [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…]