#NixOS people are serious about testing :flan_ooh:
Their testing automation is impressive! :flan_hearts:
Firefix is tested by opening a page (from valgrind man page), playing some sound, verifying some sound is played, closing a tab, display the developer tools. If anything fail, then the test fails
https://github.com/NixOS/nixpkgs/blob/master/nixos/tests/firefox.nix
Openarena (Quake 3 open source reimplementation) is tested by running a server, connecting two players, verifying the clients connect to the server
https://github.com/NixOS/nixpkgs/blob/master/nixos/tests/openarena.nix
Minecraft client is tested by running the client in a VM and use OCR to detect if it asks for creating an account
https://github.com/NixOS/nixpkgs/blob/master/nixos/tests/minecraft.nix