nixos/mympd: add nixos test

nixos/tests/all-tests.nix

@@ -542,6 +542,7 @@ in {
   munin = handleTest ./munin.nix {};
   mutableUsers = handleTest ./mutable-users.nix {};
   mxisd = handleTest ./mxisd.nix {};
+  mympd = handleTest ./mympd.nix {};
   mysql = handleTest ./mysql/mysql.nix {};
   mysql-autobackup = handleTest ./mysql/mysql-autobackup.nix {};
   mysql-backup = handleTest ./mysql/mysql-backup.nix {};

nixos/tests/mympd.nix

@@ -0,0 +1,27 @@
+import ./make-test-python.nix ({pkgs, lib, ... }: {
+  name = "mympd";
+
+  nodes.mympd = {
+    services.mympd = {
+      enable = true;
+      settings = {
+        http_port = 8081;
+      };
+    };
+
+    services.mpd.enable = true;
+  };
+
+  testScript = ''
+    start_all();
+    machine.wait_for_unit("mympd.service");
+
+    # Ensure that mympd can connect to mpd
+    machine.wait_until_succeeds(
+      "journalctl -eu mympd -o cat | grep 'Connected to MPD'"
+    )
+
+    # Ensure that the web server is working
+    machine.succeed("curl http://localhost:8081 --compressed | grep -o myMPD")
+  '';
+})