plugins/gitgutter: add tests

Author: khaneliman

tests/test-sources/plugins/git/gitgutter.nix

@@ -0,0 +1,24 @@
+{ lib, pkgs, ... }:
+{
+  empty = {
+    plugins.gitgutter.enable = true;
+  };
+
+  grep-command = {
+    plugins.gitgutter = {
+      enable = true;
+      grep = {
+        package = pkgs.gnugrep;
+        command = "";
+      };
+    };
+  };
+
+  no-packages = {
+    globals.gitgutter_git_executable = lib.getExe pkgs.git;
+    plugins.gitgutter = {
+      enable = true;
+      gitPackage = null;
+    };
+  };
+}