I write UI and communication software.

It is pretty much impossible to write meaningful tests that cover everything.

This is especially true, when you mix complex, asynchronous server interactions, with random-access UI.

Today, I am fixing a couple of bugs in an app that interacts with three different servers (all asynchronously, but some semi-synchronously. The timing diagram is a bit ... intense), and also allows the user to do things like switch contexts, while some part of the server interaction is still unresolved.

I write a bit about my approach to testing, here: https://littlegreenviper.com/miscellany/testing-harness-vs-u...