clanServices: Move ergochat test to appropriate location

Move the ergochat clanService test to the ergochat clan service.
The tests should live close to the definition of the service, so that
debugging and discoverability is better.

clanServices/ergochat/flake-module.nix

@@ -1,6 +1,17 @@
-{ lib, ... }:
+{ lib, self, ... }:
 {
   clan.modules = {
     ergochat = lib.modules.importApply ./default.nix { };
   };
+  perSystem =
+    { pkgs, ... }:
+    {
+      checks = lib.optionalAttrs (pkgs.stdenv.isLinux) {
+        ergochat = import ./tests/vm/default.nix {
+          inherit pkgs;
+          clan-core = self;
+          nixosLib = import (self.inputs.nixpkgs + "/nixos/lib") { };
+        };
+      };
+    };
 }

clanServices/ergochat/tests/vm/default.nix

@@ -0,0 +1,51 @@
+{
+  pkgs,
+  nixosLib,
+  clan-core,
+  ...
+}:
+nixosLib.runTest (
+  { ... }:
+  {
+    imports = [
+      clan-core.modules.nixosVmTest.clanTest
+    ];
+
+    hostPkgs = pkgs;
+    name = "ergochat";
+
+    clan = {
+      directory = ./.;
+      modules."@clan/ergochat" = ../../default.nix;
+      inventory = {
+        machines.server = { };
+
+        instances = {
+          ergochat-test = {
+            module.name = "@clan/ergochat";
+            roles.default.machines."server".settings = { };
+          };
+        };
+      };
+    };
+
+    nodes = {
+      server = { };
+    };
+
+    testScript = ''
+      start_all()
+
+      server.wait_for_unit("ergochat")
+
+      # Check that ergochat is running
+      server.succeed("systemctl status ergochat")
+
+      # Check that the data directory exists
+      server.succeed("test -d /var/lib/ergo")
+
+      # Check that the server is listening on the correct ports
+      server.succeed("${pkgs.netcat}/bin/nc -z -v ::1 6667")
+    '';
+  }
+)

clanServices/ergochat/tests/vm/sops/users/admin/key.json

@@ -0,0 +1,4 @@
+{
+  "publickey": "age1qm0p4vf9jvcnn43s6l4prk8zn6cx0ep9gzvevxecv729xz540v8qa742eg",
+  "type": "age"
+}