Spec admin enterprise menu helper

There was no spec despite lots of logic. And I want to add more logic.

spec/helpers/admin/enterprises_helper_spec.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe Admin::EnterprisesHelper, type: :helper do
+  let(:user) { build(:user) }
+
+  before do
+    # Enable helper to use `#can?` method.
+    # We could extract this when other helper specs need it.
+    allow_any_instance_of(CanCan::ControllerAdditions).to receive(:current_ability) do
+      Spree::Ability.new(user)
+    end
+    allow(helper).to receive(:spree_current_user) { user }
+  end
+
+  describe "#enterprise_side_menu_items" do
+    let(:enterprise) { build(:enterprise) }
+    let(:menu_items) { helper.enterprise_side_menu_items(enterprise) }
+    let(:visible_items) { menu_items.select { |i| i[:show] } }
+
+    it "lists default items" do
+      expect(visible_items.pluck(:name)).to eq %w[
+        primary_details address contact social about business_details images
+        vouchers enterprise_permissions inventory_settings tag_rules
+        shop_preferences users white_label
+      ]
+    end
+
+    it "lists enabled features", feature: :connected_apps do
+      expect(visible_items.pluck(:name)).to include "connected_apps"
+    end
+  end
+end