correct spec to handle not null visibility_level

app/controllers/admin/groups_controller.rb

@@ -59,7 +59,11 @@ class Admin::GroupsController < Admin::AdminController
 
   def save_group(group)
     group.alias_level = group_params[:alias_level].to_i if group_params[:alias_level].present?
-    group.visibility_level = group_params[:visibility_level]
+
+    if group_params[:visibility_level]
+      group.visibility_level = group_params[:visibility_level]
+    end
+
     grant_trust_level = group_params[:grant_trust_level].to_i
     group.grant_trust_level = (grant_trust_level > 0 && grant_trust_level <= 4) ? grant_trust_level : nil
 

spec/controllers/admin/groups_controller_spec.rb

@@ -115,10 +115,7 @@ describe Admin::GroupsController do
     end
 
     it "ignore name change on automatic group" do
-      expect do
-        xhr :put, :update, { id: 1, group: { name: "WAT" } }
-      end.to change { GroupHistory.count }.by(1)
-
+      xhr :put, :update, { id: 1, group: { name: "WAT" } }
       expect(response).to be_success
 
       group = Group.find(1)