Stub multiple variable controller method

app/controllers/projects/variables_controller.rb

@@ -34,6 +34,10 @@ class Projects::VariablesController < Projects::ApplicationController
     end
   end
 
+  def save_multiple
+    head :ok
+  end
+
   def destroy
     if variable.destroy
       redirect_to project_settings_ci_cd_path(project),

config/routes/project.rb

@@ -181,7 +181,12 @@ constraints(ProjectUrlConstrainer.new) do
       get '/service_desk' => 'service_desk#show', as: :service_desk
       put '/service_desk' => 'service_desk#update', as: :service_desk_refresh
 
-      resources :variables, only: [:index, :show, :update, :create, :destroy]
+      resources :variables, only: [:index, :show, :update, :create, :destroy] do
+        collection do
+          post :save_multiple
+        end
+      end
+
       resources :triggers, only: [:index, :create, :edit, :update, :destroy] do
         member do
           post :take_ownership

spec/controllers/projects/variables_controller_spec.rb

@@ -55,4 +55,11 @@ describe Projects::VariablesController do
       end
     end
   end
+
+  describe 'POST #save_multiple' do
+    it 'returns a successful response' do
+      post :save_multiple, namespace_id: project.namespace.to_param, project_id: project
+      expect(response).to have_gitlab_http_status(:ok)
+    end
+  end
 end