nixos/redis: add test

nixos/tests/all-tests.nix

@@ -234,6 +234,7 @@ in
   rabbitmq = handleTest ./rabbitmq.nix {};
   radarr = handleTest ./radarr.nix {};
   radicale = handleTest ./radicale.nix {};
+  redis = handleTest ./redis.nix {};
   redmine = handleTest ./redmine.nix {};
   roundcube = handleTest ./roundcube.nix {};
   rspamd = handleTest ./rspamd.nix {};

nixos/tests/redis.nix

@@ -0,0 +1,26 @@
+import ./make-test.nix ({ pkgs, ...} : {
+  name = "redis";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ flokli ];
+  };
+
+  nodes = {
+    machine =
+      { pkgs, ... }:
+
+      {
+        services.redis.enable = true;
+        services.redis.unixSocket = "/run/redis/redis.sock";
+      };
+  };
+
+  testScript = ''
+    startAll;
+
+    $machine->waitForUnit("redis");
+    $machine->waitForOpenPort("6379");
+
+    $machine->succeed("redis-cli ping | grep PONG");
+    $machine->succeed("redis-cli -s /run/redis/redis.sock ping | grep PONG");
+  '';
+})