Earlier quoted context omitted.
> I can guarantee you any gamedev worth his salt will have used alt-tab at some point in the game's development on windows. Not exactly a repeatable testing framework, that. > You seem to be trying really hard. I almost strained a typing finger! /s lol > Most devs are using cross platform graphics APIs. OpenGL/DirectX/Vulkan. Alt-tab breaking is likely an OS issue. All the OSes seem to suffer from it similarly. More…
Yea I don't know how you can consider something as not 'tested' without a testing framework behind it.
In fairness to game devs, alt-tab'ing out of a running game would be a challenge for many testing frameworks as it's not something you can do at compile time, requires running the game for a period of time (CI servers don't typically have GPUs), requires some sort of keyboard/mouse automation, and interaction with the underlying OS in addition to the game.
Issues which aren't added to some sort of test suite/CI tend to creep back in to codebases. Especially rapidly developed codebases like games. And threading issues are notoriously challenging to reproduce. Hopefully that helps you understand the difference.