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path: root/pkgs/test/systemd/nixos/default.nix
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{ pkgs, lib, stdenv, ... }:

let
  failures = lib.runTests {
    # Merging two non-list definitions must still result in an error
    # about a conflicting definition.
    test-unitOption-merging-non-lists-conflict =
      let nixos = pkgs.nixos {
          system.stateVersion = lib.trivial.release;
          systemd.services.systemd-test-nixos = {
            serviceConfig = lib.mkMerge [
              { StateDirectory = "foo"; }
              { StateDirectory = "bar"; }
            ];
          };
        };
      in {
      expr = (builtins.tryEval (nixos.config.systemd.services.systemd-test-nixos.serviceConfig.StateDirectory)).success;
      expected = false;
    };

    # Merging must lift non-list definitions to a list
    # if at least one of them is a list.
    test-unitOption-merging-list-non-list-append =
      let nixos = pkgs.nixos {
          system.stateVersion = lib.trivial.release;
          systemd.services.systemd-test-nixos = {
            serviceConfig = lib.mkMerge [
              { StateDirectory = "foo"; }
              { StateDirectory = ["bar"]; }
            ];
          };
        };
      in {
      expr = nixos.config.systemd.services.systemd-test-nixos.serviceConfig.StateDirectory;
      expected = [ "foo" "bar" ];
    };
  };
in

lib.optional (failures != [])
  (throw "The following systemd unit tests failed: ${lib.generators.toPretty {} failures}")