Merge branch 'fix/gb/ci-build-stuck-badge-performance-experiment' into 'master'

Add build stuck badge performance experiment

See merge request gitlab-org/gitlab!50521

app/models/ci/build.rb

@@ -730,7 +730,13 @@ module Ci
     end
 
     def any_runners_online?
-      project.any_runners? { |runner| runner.active? && runner.online? && runner.can_pick?(self) }
+      project.any_runners? do |runner|
+        if Feature.enabled?(:ci_build_stuck_badge_performance_experiment, project, type: :development, default_enabled: false)
+          runner.active? && runner.online?
+        else
+          runner.active? && runner.online? && runner.can_pick?(self)
+        end
+      end
     end
 
     def stuck?

changelogs/unreleased/fix-gb-ci-build-stuck-badge-performance-experiment.yml

+---
+title: Add build stuck badge performance experiment
+merge_request: 50521
+author:
+type: performance

config/feature_flags/development/ci_build_stuck_badge_performance_experiment.yml

+---
+name: ci_build_stuck_badge_performance_experiment
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50521
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/295490
+milestone: '13.7'
+type: development
+group: group::continuous integration
+default_enabled: false

spec/models/ci/build_spec.rb

@@ -580,9 +580,27 @@ RSpec.describe Ci::Build do
         is_expected.to be_falsey
       end
 
-      it 'that cannot handle build' do
-        expect_any_instance_of(Ci::Runner).to receive(:can_pick?).and_return(false)
-        is_expected.to be_falsey
+      context 'when runners are on-line but none can pick a build' do
+        before do
+          allow_any_instance_of(Ci::Runner)
+            .to receive(:can_pick?).and_return(false)
+        end
+
+        context 'when a performance experiement feature flag is enabled' do
+          before do
+            stub_feature_flags(ci_build_stuck_badge_performance_experiment: true)
+          end
+
+          it { is_expected.to be_truthy }
+        end
+
+        context 'when a performance experiment is not running' do
+          before do
+            stub_feature_flags(ci_build_stuck_badge_performance_experiment: false)
+          end
+
+          it { is_expected.to be_falsey }
+        end
       end
     end
   end