Example: integration testing a flake

mightyiam · June 19, 2025, 10:00am

dev/modules/test-runner.nix

5f4ef1fd1

{
  lib,
  self,
  inputs,
  ...
}:
{
  perSystem =
    { pkgs, ... }:
    let
      testCasesDir = self + "/test-cases";
    in
    {
      treefmt.settings.global.excludes = [ "*.txt" ];

      checks =
        testCasesDir
        |> builtins.readDir
        |> lib.mapAttrs' (
          dirname: type:

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fzakaria · June 19, 2025, 2:45pm

Recursive-nix is cool but I’m under the impression it’ll go away in it’s current form when dynamic derivations land.

Cool example. I do stuff like this with Bazel to validate that config flags actually fail the build.
(Testing for failure cases)

I think if it’s just the flake I’ve had better success putting it in a subfolder that I call in my CI

Thanks for sharing.