wrapper-manager/dconf: add test and fix module

More proof that I don't do testing in this project. :)

modules/wrapper-manager/dconf.nix

@@ -39,14 +39,15 @@ in
         dconfProfileFile =
           pkgs.writeText
             "dconf-profile"
-            (lib.concatMapStrings (profile: "${profile}\n") submoduleCfg.profiles);
+            (lib.concatMapStrings (db: "${db}\n") submoduleCfg.profile);
 
+        dconfDirName = "wrapper-manager-dconf-${config.executableName}";
         dconfSettings =
-          settingsFormat.generate "wrapper-manager-dconf-${config.executableName}" submoduleCfg.settings;
+          settingsFormat.generate dconfDirName submoduleCfg.settings;
 
         dconfSettingsDatabase =
           pkgs.runCommand "wrapper-manager-dconf-${config.executableName}-database" { nativeBuildInputs = [ submoduleCfg.package ]; } ''
-            dconf compile ${builtins.placeholder "out"} ${dconfSettings}
+            dconf compile ${builtins.placeholder "out"} "${dconfSettings}/dconf"
           '';
       in {
         options.dconf = {

tests/modules/wrapper-manager/dconf/basic.nix

@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+
+let
+  section = "one/foodogsquared/SomeMadeUpCrap";
+  key = "somemadeupkey";
+  value = true;
+in
+{
+  wrappers.dconf-test = {
+    arg0 = lib.getExe' pkgs.dconf "dconf";
+    dconf = {
+      enable = true;
+      settings.${section}.${key} = value;
+    };
+  };
+
+  build.extraPassthru.tests = {
+    dconfCheck = pkgs.runCommand "dconf-wrapped-test" { } ''
+      export HOME=$TMPDIR
+
+      # We've hardcoded the value for now since Nix toString function makes the
+      # boolean either "1" or an empty string.
+      [ "$(${lib.getExe' config.build.toplevel "dconf-test"} read '/${section}/${key}')" = 'true' ] && touch $out
+    '';
+  };
+}

tests/modules/wrapper-manager/dconf/default.nix

@@ -0,0 +1,3 @@
+{
+  basic = ./basic.nix;
+}

tests/modules/wrapper-manager/default.nix

@@ -21,4 +21,5 @@ in
   boxxy = runTests ./sandboxing/boxxy { };
   zellij = runTests ./programs/zellij { };
   jujutsu = runTests ./programs/jujutsu { };
+  dconf = runTests ./dconf { };
 }