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.

checks/flake-module.nix

@@ -54,7 +54,6 @@ in
               borgbackup = import ./borgbackup nixosTestArgs;
               data-mesher = import ./data-mesher nixosTestArgs;
               syncthing = import ./syncthing nixosTestArgs;
-              ergochat = import ./ergochat nixosTestArgs;
             }
             // lib.optionalAttrs (pkgs.stdenv.hostPlatform.system == "aarch64-linux") {
               # for some reason this hangs in an odd place in CI, but it works on my machine ...

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

@@ -16,7 +16,7 @@ nixosLib.runTest (
 
     clan = {
       directory = ./.;
-      modules."@clan/ergochat" = ../../clanServices/ergochat/default.nix;
+      modules."@clan/ergochat" = ../../default.nix;
       inventory = {
         machines.server = { };