nixos/lavalink: add nixos test

nixos/tests/all-tests.nix

@@ -713,6 +713,7 @@ in
   languagetool = handleTest ./languagetool.nix { };
   lanraragi = handleTest ./lanraragi.nix { };
   latestKernel.login = handleTest ./login.nix { latestKernel = true; };
+  lavalink = runTest ./lavalink.nix;
   leaps = handleTest ./leaps.nix { };
   lemmy = handleTest ./lemmy.nix { };
   libinput = handleTest ./libinput.nix { };

nixos/tests/lavalink.nix

@@ -0,0 +1,43 @@
+{ lib, ... }:
+
+let
+  password = "s3cRe!p4SsW0rD";
+in
+
+{
+  name = "lavalink";
+  meta.maintainers = with lib.maintainers; [ nanoyaki ];
+
+  nodes = {
+    machine = {
+      services.lavalink = {
+        enable = true;
+        port = 1234;
+        inherit password;
+      };
+    };
+    machine2 =
+      { pkgs, ... }:
+      {
+        services.lavalink = {
+          enable = true;
+          port = 1235;
+          environmentFile = "${pkgs.writeText "passwordEnvFile" ''
+            LAVALINK_SERVER_PASSWORD=${password}
+          ''}";
+        };
+      };
+  };
+
+  testScript = ''
+    start_all()
+
+    machine.wait_for_unit("lavalink.service")
+    machine.wait_for_open_port(1234)
+    machine.succeed("curl --header \"User-Id: 1204475253028429844\" --header \"Client-Name: shoukaku/4.1.1\" --header \"Authorization: ${password}\" http://localhost:1234/v4/info --fail -v")
+
+    machine2.wait_for_unit("lavalink.service")
+    machine2.wait_for_open_port(1235)
+    machine2.succeed("curl --header \"User-Id: 1204475253028429844\" --header \"Client-Name: shoukaku/4.1.1\" --header \"Authorization: ${password}\" http://localhost:1235/v4/info --fail -v")
+  '';
+}