Check for minimal count of performance bar metrics

qa/qa/page/layout/performance_bar.rb

@@ -21,9 +21,9 @@ module QA
           has_element?(:performance_bar)
         end
 
-        def has_detailed_metrics?(count)
+        def has_detailed_metrics?(minimum_count)
           retry_until(sleep_interval: 1) do
-            all_elements(:detailed_metric_content, count: count).all? do |metric|
+            all_elements(:detailed_metric_content, minimum: minimum_count).all? do |metric|
               metric.has_text?(%r{\d+})
             end
           end

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

@@ -4,8 +4,8 @@ module QA
   context 'Non-devops' do
     describe 'Performance bar display', :requires_admin do
       context 'when logged in as an admin user' do
-        # 4 metrics: pg, gitaly, redis, total
-        let(:metrics_count) { 4 }
+        # performance metrics: pg, gitaly, redis, rugged (feature flagged), total (not always provided)
+        let(:minimum_metrics_count) { 3 }
 
         before do
           Flow::Login.sign_in_as_admin
@@ -28,7 +28,7 @@ module QA
 
           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_detailed_metrics(minimum_metrics_count)
             expect(bar_component).to have_request_for('realtime_changes') # Always requested on issue pages
           end
         end