nixpkgs/nixos/tests/hledger-web.nix

import ./make-test-python.nix (
  { pkgs, lib, ... }:
  let
    journal = pkgs.writeText "test.journal" ''
      2010/01/10 Loan
          assets:cash                 500$
          income:loan                -500$
      2010/01/10 NixOS Foundation donation
          expenses:donation           250$
          assets:cash                -250$
    '';
  in
  rec {
    name = "hledger-web";
    meta.maintainers = with lib.maintainers; [ marijanp ];

    nodes = rec {
      server =
        { config, pkgs, ... }:
        {
          services.hledger-web = {
            host = "127.0.0.1";
            port = 5000;
            enable = true;
            allow = "edit";
          };
          networking.firewall.allowedTCPPorts = [ config.services.hledger-web.port ];
          systemd.services.hledger-web.preStart = ''
            ln -s ${journal} /var/lib/hledger-web/.hledger.journal
          '';
        };
      apiserver =
        { ... }:
        {
          imports = [ server ];
          services.hledger-web.serveApi = true;
        };
    };

    testScript = ''
      start_all()

      server.wait_for_unit("hledger-web.service")
      server.wait_for_open_port(5000)
      with subtest("Check if web UI is accessible"):
          page = server.succeed("curl -L http://127.0.0.1:5000")
          assert ".hledger.journal" in page

      apiserver.wait_for_unit("hledger-web.service")
      apiserver.wait_for_open_port(5000)
      with subtest("Check if the JSON API is served"):
          transactions = apiserver.succeed("curl -L http://127.0.0.1:5000/transactions")
          assert "NixOS Foundation donation" in transactions
    '';
  }
)