tests: simplify fetch-tests slightly

Simplify by reducing the number of transformations done to the
test-files' test-case modules attr.

Since `pkgs.linkFarm` can accept _either_ a list or an attrset, we don't
need to transform the attrset into a list.

Author: MattSturgeon

tests/default.nix

@@ -9,14 +9,11 @@ let
   test-derivation = import ../lib/tests.nix { inherit pkgs lib; };
   inherit (test-derivation) mkTestDerivationFromNixvimModule;
 
-  mkTest =
-    { name, module }:
-    {
-      inherit name;
-      path = mkTestDerivationFromNixvimModule {
-        inherit name module;
-        pkgs = pkgsUnfree;
-      };
+  moduleToTest =
+    name: module:
+    mkTestDerivationFromNixvimModule {
+      inherit name module;
+      pkgs = pkgsUnfree;
     };
 
   # List of files containing configurations
@@ -27,29 +24,27 @@ let
 
   exampleFiles = {
     name = "examples";
-    modules =
+    file = ../example.nix;
+    cases =
       let
         config = import ../example.nix { inherit pkgs; };
       in
-      [
-        {
-          name = "main";
-          module = builtins.removeAttrs config.programs.nixvim [
-            # This is not available to standalone modules, only HM & NixOS Modules
-            "enable"
-            # This is purely an example, it does not reflect a real usage
-            "extraConfigLua"
-            "extraConfigVim"
-          ];
-        }
-      ];
+      {
+        main = builtins.removeAttrs config.programs.nixvim [
+          # This is not available to standalone modules, only HM & NixOS Modules
+          "enable"
+          # This is purely an example, it does not reflect a real usage
+          "extraConfigLua"
+          "extraConfigVim"
+        ];
+      };
   };
 in
 # We attempt to build & execute all configurations
 lib.pipe (testFiles ++ [ exampleFiles ]) [
   (builtins.map (file: {
     inherit (file) name;
-    path = pkgs.linkFarm file.name (builtins.map mkTest file.modules);
+    path = pkgs.linkFarm file.name (builtins.mapAttrs moduleToTest file.cases);
   }))
   (helpers.groupListBySize 10)
   (lib.imap1 (

tests/fetch-tests.nix

@@ -5,26 +5,25 @@
   helpers,
 }:
 let
-  # Import a test file into the form { name = ""; file = ""; modules = []; }
+  # Import a test file into the form { name = ""; file = ""; cases = {}; }
   handleTestFile =
     file: namespace:
     let
       fnOrAttrs = import file;
+    in
+    {
+      inherit file;
+      name = lib.strings.concatStringsSep "-" namespace;
       cases =
         if builtins.isFunction fnOrAttrs then
           # Call the function
           fnOrAttrs { inherit pkgs lib helpers; }
         else
           fnOrAttrs;
-    in
-    {
-      inherit file;
-      name = lib.strings.concatStringsSep "-" namespace;
-      modules = lib.mapAttrsToList (name: module: { inherit name module; }) cases;
     };
 
   # Recurse into all directories, extracting files as we find them.
-  # This returns a list of { name; file; modules;  } attrsets.
+  # This returns a list of { name; file; cases;  } attrsets.
   fetchTests =
     path: namespace:
     let
@@ -50,5 +49,4 @@ let
       builtins.concatLists
     ];
 in
-# A list of the form [ { name = "..."; modules = [ /* test case modules */ ]; } ]
 fetchTests root [ ]