tests/delta: add 'delta-final-package'

This tests the usage of the wrapper program when `programs.git` is
disabled, and therefore home-manager is _not_ generating its
configuration.

tests/modules/programs/delta/default.nix

@@ -1,5 +1,6 @@
 {
   delta-basic = ./delta-basic.nix;
+  delta-final-package = ./delta-final-package.nix;
   delta-with-git-integration = ./delta-with-git-integration.nix;
   delta-migration = ./delta-migration.nix;
 }

tests/modules/programs/delta/delta-final-package.nix

@@ -0,0 +1,35 @@
+{ config, ... }:
+
+{
+  programs.delta = {
+    enable = true;
+    package = config.lib.test.mkStubPackage {
+      name = "delta";
+      buildScript = ''
+        mkdir -p $out/bin
+        touch $out/bin/delta
+        chmod 755 $out/bin/delta
+      '';
+    };
+    options = {
+      features = "line-numbers decorations";
+      syntax-theme = "Dracula";
+      decorations = {
+        commit-decoration-style = "bold yellow box ul";
+        file-style = "bold yellow ul";
+        file-decoration-style = "none";
+      };
+    };
+    enableGitIntegration = true;
+  };
+  programs.git.enable = false;
+
+  nmt.script = ''
+    # Git config should NOT exist since `git.enable` is false
+    assertPathNotExists home-files/.config/git/config
+
+    # Verify the wrapper passes the config flag
+    # The wrapper script should contain --config flag
+    assertFileRegex home-path/bin/delta '\-\-config'
+  '';
+}