Add missing argument to page object method

Add count argument to has_detailed_specs method
Refactor performance_bar_spec

qa/qa/page/layout/performance_bar.rb

@@ -21,7 +21,7 @@ module QA
           has_element?(:performance_bar)
         end
 
-        def has_detailed_metrics?
+        def has_detailed_metrics?(count)
           retry_until(sleep_interval: 1) do
             all_elements(:detailed_metric_content, count: count).all? do |metric|
               metric.has_text?(%r{\d+})

qa/qa/specs/features/browser_ui/non_devops/performance_bar_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Performance bar' do
-    context 'when logged in as an admin user', :requires_admin, quarantine: 'https://gitlab.com/gitlab-org/gitlab/issues/196141' do
-      before do
-        Flow::Login.sign_in_as_admin
-        Page::Main::Menu.perform(&:go_to_admin_area)
-        Page::Admin::Menu.perform(&:go_to_metrics_and_profiling_settings)
+  context 'Non-devops' do
+    describe 'Performance bar display', :requires_admin, quarantine: 'https://gitlab.com/gitlab-org/gitlab/issues/196141' do
+      context 'when logged in as an admin user' do
+        # 4 metrics: pg, gitaly, redis, total
+        let(:metrics_count) { 4 }
 
-        Page::Admin::Settings::MetricsAndProfiling.perform do |setting|
-          setting.expand_performance_bar do |page|
-            page.enable_performance_bar
-            page.save_settings
+        before do
+          Flow::Login.sign_in_as_admin
+          Page::Main::Menu.perform(&:go_to_admin_area)
+          Page::Admin::Menu.perform(&:go_to_metrics_and_profiling_settings)
+
+          Page::Admin::Settings::MetricsAndProfiling.perform do |setting|
+            setting.expand_performance_bar do |page|
+              page.enable_performance_bar
+              page.save_settings
+            end
           end
         end
-      end
 
-      it 'shows results for the original request and AJAX requests' do
-        # Issue pages always make AJAX requests
-        Resource::Issue.fabricate_via_browser_ui! do |issue|
-          issue.title = 'Performance bar test'
-        end
+        it 'shows results for the original request and AJAX requests' do
+          # Issue pages always make AJAX requests
+          Resource::Issue.fabricate_via_browser_ui! do |issue|
+            issue.title = 'Performance bar test'
+          end
 
-        Page::Layout::PerformanceBar.perform do |bar_component|
-          expect(bar_component).to have_performance_bar
-          expect(bar_component).to have_detailed_metrics(4)
-          expect(bar_component).to have_request_for('realtime_changes') # Always requested on issue pages
+          Page::Layout::PerformanceBar.perform do |bar_component|
+            expect(bar_component).to have_performance_bar
+            expect(bar_component).to have_detailed_metrics(metrics_count)
+            expect(bar_component).to have_request_for('realtime_changes') # Always requested on issue pages
+          end
         end
       end
     end