I have a little web app running on Deno Deploy and I want to see how it handles people connecting from multiple regions. There's a BroadcastChannel class that lets you send messages to any servers running in other regions, but to test it, I need to make connections in multiple regions, so there's more than one server running.

What are good ways to test this, either interactively or by writing tests? Maybe use a VPN? What's your favorite?

I'm currently in the process of reading the excellent "Lessons Learned in Software Testing: A Context-Driven Approach". Early on the following is mentioned.

Test common threats before exotic threats.

Seems reasonable enough. That said, it got me thinking It'd be cool to generate a list of such threats for future devs/testers to draw on. So...I'm calling on the collective experience of any Tilders involved in iOS or Android development to lend a hand.

In your time working on mobile, what issues have you encountered that you would you classify as exotic? I.e those issues that infrequently arise but when they do can cause major damage. Any and all help is appreciated.

Pretty straight forward question, but basically I was watching a discussion panel the other day talking about the ethics of Self-Driving cars. A topic came up about people writing crappy code, and more than that, people not testing their code. And if they do, they do point testing. I am in my last semester of uni and I am working with some companies where we are doing pretty extensive testing, happy flows and a lot of alternate flows, as well as UI/UX testing. I wanted to extend this question to you, do you guys do testing, what type? How much do you focus on it? And if u love it/hate it?