Convert admin/tags controller specs to system specs (#32447)

spec/system/admin/tags_spec.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Admin Tags' do
+  describe 'Tag interaction' do
+    let!(:tag) { Fabricate(:tag, name: 'test') }
+
+    before { sign_in Fabricate(:user, role: UserRole.find_by(name: 'Admin')) }
+
+    it 'allows tags listing and editing' do
+      visit admin_tags_path
+
+      expect(page)
+        .to have_title(I18n.t('admin.tags.title'))
+
+      click_on '#test'
+
+      fill_in display_name_field, with: 'NewTagName'
+      expect { click_on submit_button }
+        .to_not(change { tag.reload.display_name })
+      expect(page)
+        .to have_content(match_error_text)
+
+      fill_in display_name_field, with: 'TEST'
+      expect { click_on submit_button }
+        .to(change { tag.reload.display_name }.to('TEST'))
+    end
+
+    def display_name_field
+      I18n.t('simple_form.labels.defaults.display_name')
+    end
+
+    def match_error_text
+      I18n.t('tags.does_not_match_previous_name')
+    end
+  end
+end