home-manager/tests/modules/programs/borgmatic/both-sourcedirectories-and-patterns.nix

{
  programs.borgmatic = {
    enable = true;
    backups = {
      main = {
        location = {
          sourceDirectories = [ "/my-stuff-to-backup" ];
          patterns = [
            "R /"
            "+ my-stuff-to-backup"
          ];
          repositories = [ "/mnt/disk1" ];
        };
      };
    };
  };

  test.asserts.assertions.expected = [
    ''
      Borgmatic backup configuration "main" cannot specify both 'location.sourceDirectories' and 'location.patterns'.
    ''
  ];
}