plugins/tagbar: add tests

tests/test-sources/plugins/languages/tagbar.nix

@@ -0,0 +1,52 @@
+{
+  empty = {
+  };
+
+  example = {
+    plugins.tagbar = {
+      enable = true;
+
+      settings = {
+        position = "right";
+        autoclose = false;
+        autofocus = false;
+        foldlevel = 2;
+        autoshowtag = true;
+        iconchars = ["" ""];
+        wrap = true;
+        show_data_type = true;
+        show_visibility = true;
+        visibility_symbols = {
+          public = "󰡭 ";
+          protected = "󱗤 ";
+          private = "󰛑 ";
+        };
+        show_linenumbers = true;
+        case_insensitive = true;
+        show_tag_count = true;
+        compact = true;
+        indent = true;
+        autopreview = false;
+        previewwin_pos = "belowleft";
+        scopestrs = {
+          class = "\\uf0e8";
+          struct = "\\uf0e8";
+          const = "\\uf8ff";
+          constant = "\\uf8ff";
+          enum = "\\uf702";
+          field = "\\uf30b";
+          func = "\\uf794";
+          function = "\\uf794";
+          getter = "\\ufab6";
+          implementation = "\\uf776";
+          interface = "\\uf7fe";
+          map = "\\ufb44";
+          member = "\\uf02b";
+          method = "\\uf6a6";
+          setter = "\\uf7a9";
+          variable = "\\uf71b";
+        };
+      };
+    };
+  };
+}