Adds a pkgs.testers.nixosTest (checks.<system>.invoiceninja) that boots
the module end-to-end and checks that mysql/redis/phpfpm/queue-worker/
nginx come up, the one-time migrate/seed/admin-create setup completed,
the app shell and /login page are served, invoiceninja-manage works,
and the seeded admin can log in via the API.
Factors the shared services.invoiceninja config used by both the
interactive VM and the new test into tests/common.nix, and satisfies
NixOS's fileSystems/bootloader assertions in the interactive VM config
so `nix flake check` evaluates nixosConfigurations.test cleanly (the
qemu-vm module already overrides both when actually building
config.system.build.vm, so this only affects the toplevel-eval path).
Also adds a `just test` recipe, a CLAUDE.md codebase overview, and a
.gitignore for the result/nixos.qcow2 build artifacts.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This makes testing/debugging easier by allowing to login as root
directly. The previous test system configuration added a step to this
process by forcing devs to login as test and use sudo to escalate to
root.
Having the declaration of system.stateVersion just adds more
maintainance for devs. For example, changing the nixpkgs value in
flake.nix requires a change of system.stateVersion in tests/default.nix.
awkawbandClaude Sonnet 5