nixpkgs/nixos/tests/pgbouncer.nix

import ./make-test-python.nix ({ pkgs, ... } :
let
  testAuthFile = pkgs.writeTextFile {
    name = "authFile";
    text = ''
      "testuser" "testpass"
    '';
  };
in
{
  name = "pgbouncer";
  meta = with pkgs.lib.maintainers; {
    maintainers = [ _1000101 ];
  };
  nodes = {
    one = { config, pkgs, ... }: {

      systemd.services.postgresql = {
        postStart = ''
            ${pkgs.postgresql}/bin/psql -U postgres -c "ALTER ROLE testuser WITH LOGIN PASSWORD 'testpass'";
        '';
      };

      services = {
        postgresql = {
          enable = true;
          ensureDatabases = [ "testdb" ];
          ensureUsers = [
          {
            name = "testuser";
            ensurePermissions = {
              "DATABASE testdb" = "ALL PRIVILEGES";
            };
          }];
          authentication = ''
            local testdb testuser scram-sha-256
          '';
        };

        pgbouncer = {
          enable = true;
          listenAddress = "localhost";
          databases = { testdb = "host=/run/postgresql/ port=5432 auth_user=testuser dbname=testdb"; };
          authType = "scram-sha-256";
          authFile = testAuthFile;
        };
      };
    };
  };

  testScript = ''
    start_all()
    one.wait_for_unit("default.target")
    one.require_unit_state("pgbouncer.service", "active")

    # Test if we can make a query through PgBouncer
    one.wait_until_succeeds(
        "psql 'postgres://testuser:testpass@localhost:6432/testdb' -c 'SELECT 1;'"
    )
  '';
})