Convert admin/domain_allows spec controller->system (#33365)

spec/system/admin/domain_allows_spec.rb

@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Admin::DomainAllows' do
+  let(:user) { Fabricate(:user, role: UserRole.find_by(name: 'Admin')) }
+  let(:domain) { 'host.example' }
+
+  before do
+    Fabricate :account, domain: domain
+    Instance.refresh
+    sign_in user
+  end
+
+  around do |example|
+    original = Rails.configuration.x.limited_federation_mode
+    Rails.configuration.x.limited_federation_mode = true
+
+    example.run
+
+    Rails.configuration.x.limited_federation_mode = original
+  end
+
+  describe 'Managing domain allows' do
+    it 'saves and then deletes a record' do
+      # Visit new page
+      visit new_admin_domain_allow_path
+      click_on I18n.t('admin.domain_allows.add_new')
+      expect(page)
+        .to have_content(I18n.t('admin.domain_allows.add_new'))
+
+      # Submit invalid with missing domain
+      fill_in 'domain_allow_domain', with: ''
+      expect { submit_form }
+        .to not_change(DomainAllow, :count)
+      expect(page)
+        .to have_content(/error below/)
+
+      # Submit valid with domain present
+      fill_in 'domain_allow_domain', with: domain
+      expect { submit_form }
+        .to change(DomainAllow, :count).by(1)
+      expect(page)
+        .to have_content(I18n.t('admin.domain_allows.created_msg'))
+
+      # Visit instance page and delete the domain allow
+      visit admin_instance_path(domain)
+      expect { delete_domain_allow }
+        .to change(DomainAllow, :count).by(-1)
+      expect(page)
+        .to have_content(I18n.t('admin.domain_allows.destroyed_msg'))
+    end
+
+    def submit_form
+      click_on I18n.t('admin.domain_allows.add_new')
+    end
+
+    def delete_domain_allow
+      click_on I18n.t('admin.domain_allows.undo')
+    end
+  end
+end