test: add test for config with default_room_version

This commit refactors the test a bit to run the basic test script with
different configs. Currently we have two configs we test:

- the bare minimum to make it run (base)
- base + default_room_version set to "12"

nix/tests/default.nix

@@ -6,43 +6,10 @@
       pkgs,
       ...
     }:
-    {
+    let
-      # run some nixos tests as checks
+      baseTestScript =
-      checks = lib.pipe self'.packages [
+        pkgs.writers.writePython3Bin "do_test" { libraries = [ pkgs.python3Packages.matrix-nio ]; }
-        # we take all packages (names)
+          ''
-        builtins.attrNames
-        # we filter out all packages that end with `-bin` (which we are interested in for testing)
-        (builtins.filter (lib.hasSuffix "-bin"))
-        # for each of these binaries we built the basic nixos test
-        #
-        # this test was initially yoinked from
-        #
-        # https://github.com/NixOS/nixpkgs/blob/960ce26339661b1b69c6f12b9063ca51b688615f/nixos/tests/matrix/continuwuity.nix
-        (builtins.map (name: {
-          name = "test-${name}";
-          value = pkgs.testers.runNixOSTest {
-            inherit name;
-
-            nodes = {
-              continuwuity = {
-                services.matrix-continuwuity = {
-                  enable = true;
-                  package = self'.packages.${name};
-                  settings.global = {
-                    server_name = name;
-                    address = [ "0.0.0.0" ];
-                    allow_registration = true;
-                    yes_i_am_very_very_sure_i_want_an_open_registration_server_prone_to_abuse = true;
-                  };
-                  extraEnvironment.RUST_BACKTRACE = "yes";
-                };
-                networking.firewall.allowedTCPPorts = [ 6167 ];
-              };
-              client =
-                { pkgs, ... }:
-                {
-                  environment.systemPackages = [
-                    (pkgs.writers.writePython3Bin "do_test" { libraries = [ pkgs.python3Packages.matrix-nio ]; } ''
             import asyncio
             import nio
 
@@ -100,9 +67,41 @@
 
             if __name__ == "__main__":
                 asyncio.run(main())
-                    '')
+          '';
-                  ];
+    in
+    {
+      # run some nixos tests as checks
+      checks = lib.pipe self'.packages [
+        # we take all packages (names)
+        builtins.attrNames
+        # we filter out all packages that end with `-bin` (which we are interested in for testing)
+        (builtins.filter (lib.hasSuffix "-bin"))
+        # for each of these binaries we built the basic nixos test
+        #
+        # this test was initially yoinked from
+        #
+        # https://github.com/NixOS/nixpkgs/blob/960ce26339661b1b69c6f12b9063ca51b688615f/nixos/tests/matrix/continuwuity.nix
+        (builtins.concatMap (
+          name:
+          builtins.map
+            (
+              { config, suffix }:
+              {
+                name = "test-${name}-${suffix}";
+                value = pkgs.testers.runNixOSTest {
+                  inherit name;
+
+                  nodes = {
+                    continuwuity = {
+                      services.matrix-continuwuity = {
+                        enable = true;
+                        package = self'.packages.${name};
+                        settings = config;
+                        extraEnvironment.RUST_BACKTRACE = "yes";
                       };
+                      networking.firewall.allowedTCPPorts = [ 6167 ];
+                    };
+                    client.environment.systemPackages = [ baseTestScript ];
                   };
 
                   testScript = ''
@@ -113,11 +112,38 @@
                           continuwuity.wait_for_open_port(6167)
 
                     with subtest("ensure messages can be exchanged"):
-                    client.succeed("do_test >&2")
+                          client.succeed("${lib.getExe baseTestScript} >&2")
                   '';
 
                 };
-        }))
+              }
+            )
+            [
+              {
+                suffix = "base";
+                config = {
+                  global = {
+                    server_name = name;
+                    address = [ "0.0.0.0" ];
+                    allow_registration = true;
+                    yes_i_am_very_very_sure_i_want_an_open_registration_server_prone_to_abuse = true;
+                  };
+                };
+              }
+              {
+                suffix = "with-room-version";
+                config = {
+                  global = {
+                    server_name = name;
+                    address = [ "0.0.0.0" ];
+                    allow_registration = true;
+                    yes_i_am_very_very_sure_i_want_an_open_registration_server_prone_to_abuse = true;
+                    default_room_version = "12";
+                  };
+                };
+              }
+            ]
+        ))
         builtins.listToAttrs
       ];
     };