Sometimes when you’re writing Javascript unit tests you have to give Javascript a chance to catch up before checking your assertions. Javascript uses a single event loop, so it isn’t multi-threaded in the same way as other languages. You can still get a “multi-threaded feel” by using callbacks (promises, observables, etc), but at the end … [Read more…]
Recently I was updating and fixing some existing unit tests after doing a (rather large) overhaul of code.The unit test previously needed to wait for an asynchronous callback to finish before continuing, something like this: Note the optional done parameter provided to beforeEach. This is a void function that signals Jasmine that the callback is … [Read more…]
Timers are pretty useful. They allow you to define a block of code that will execute on a given interval. It’s the C# version of JavaScript’s setInterval. There’s a lot of different reasons for using a timer, such as persisting updates to a database. Since database calls can be slow, maybe you want to build … [Read more…]