nixpkgs/nixos/tests/nix/misc.nix

# Miscellaneous small tests that don't warrant their own VM run.
{ pkgs, ... }:

let
  inherit (pkgs) lib;
  tests = {
    default = testsForPackage { nixPackage = pkgs.nix; };
    lix = testsForPackage { nixPackage = pkgs.lix; };
  };

  testsForPackage = args: lib.recurseIntoAttrs {
    # If the attribute is not named 'test'
    # You will break all the universe on the release-*.nix side of things.
    # `discoverTests` relies on `test` existence to perform a `callTest`.
    test = testMiscFeatures args;
    passthru.override = args': testsForPackage (args // args');
  };

  testMiscFeatures = { nixPackage, ... }: pkgs.testers.nixosTest (
  let
    foo = pkgs.writeText "foo" "Hello World";
  in {
    name = "${nixPackage.pname}-misc";
    meta.maintainers = with lib.maintainers; [ raitobezarius artturin ];

    nodes.machine =
      { lib, ... }:
      {
        system.extraDependencies = [ foo ];

        nix.package = nixPackage;
      };

    testScript =
      ''
        import json

        def get_path_info(path):
            result = machine.succeed(f"nix --option experimental-features nix-command path-info --json {path}")
            parsed = json.loads(result)
            return parsed

        with subtest("nix-db"):
            out = "${foo}"
            info = get_path_info(out)
            print(info)

            pathinfo = info[0] if isinstance(info, list) else info[out]

            if (
                pathinfo["narHash"]
                != "sha256-BdMdnb/0eWy3EddjE83rdgzWWpQjfWPAj3zDIFMD3Ck="
            ):
                raise Exception("narHash not set")

            if pathinfo["narSize"] != 128:
                raise Exception("narSize not set")

        with subtest("nix-db"):
            machine.succeed("nix-store -qR /run/current-system | grep nixos-")
      '';
  });
  in
  tests