Add ability to manage voucher for enterprise user

Update spec accordingly

app/models/spree/ability.rb

@@ -179,6 +179,8 @@ module Spree
       can [:admin, :create], :manager_invitation
 
       can [:admin, :index], :oidc_setting
+
+      can [:admin, :create], Voucher
     end
 
     def add_product_management_abilities(user)

spec/models/spree/ability_spec.rb

@@ -788,6 +788,10 @@ describe Spree::Ability do
         is_expected.to have_ability([:admin, :known_users, :customers], for: :search)
         is_expected.not_to have_ability([:users], for: :search)
       end
+
+      it "has the ability to manage vouchers" do
+        is_expected.to have_ability([:admin, :create], for: Voucher)
+      end
     end
 
     context 'enterprise owner' do

spec/system/admin/vouchers_spec.rb

@@ -3,7 +3,7 @@
 require 'system_helper'
 
 describe '
-    As an administrator
+    As an entreprise user
     I want to manage vouchers
 ' do
   include WebHelper
@@ -11,9 +11,13 @@ describe '
 
   let(:enterprise) { create(:supplier_enterprise, name: 'Feedme') }
   let(:voucher_code) { 'awesomevoucher' }
+  let(:enterprise_user) { create(:user, enterprise_limit: 1) }
 
   before do
     Flipper.enable(:vouchers)
+
+    enterprise_user.enterprise_roles.build(enterprise: enterprise).save
+    login_as enterprise_user
   end
 
   it 'lists enterprise vouchers' do
@@ -21,7 +25,8 @@ describe '
     Voucher.create!(enterprise: enterprise, code: voucher_code)
 
     # When I go to the enterprise voucher tab
-    login_as_admin_and_visit edit_admin_enterprise_path(enterprise)
+    visit edit_admin_enterprise_path(enterprise)
+
     click_link 'Vouchers'
 
     # Then I see a list of vouchers
@@ -32,7 +37,8 @@ describe '
   it 'creates a voucher' do
     # Given an enterprise
     # When I go to the enterprise voucher tab and click new
-    login_as_admin_and_visit edit_admin_enterprise_path(enterprise)
+    visit edit_admin_enterprise_path(enterprise)
+
     click_link 'Vouchers'
     within "#vouchers_panel" do
       click_link 'Add New'
@@ -56,7 +62,7 @@ describe '
     it 'shows an error flash message' do
       # Given an enterprise
       # When I go to the new voucher page
-      login_as_admin_and_visit new_admin_enterprise_voucher_path(enterprise)
+      visit new_admin_enterprise_voucher_path(enterprise)
 
       # And I fill in fields with invalid data and click save
       click_button 'Save'