Return only the latest build with coverage in MR widget JSON

app/models/ci/pipeline.rb

@@ -875,7 +875,7 @@ module Ci
     end
 
     def builds_with_coverage
-      builds.with_coverage
+      builds.latest.with_coverage
     end
 
     def has_reports?(reports_scope)

changelogs/unreleased/246793-mr-coverage-only-latest-build.yml

+---
+title: Do not show retried builds in the MR code coverage
+merge_request: 42402
+author: Simon Lenz @koala7
+type: fixed

spec/models/ci/pipeline_spec.rb

@@ -3628,6 +3628,16 @@ RSpec.describe Ci::Pipeline, :mailer, factory_default: :keep do
       expect(builds).to include(rspec, jest)
       expect(builds).not_to include(karma)
     end
+
+    it 'returns only latest builds' do
+      obsolete = create(:ci_build, name: "jest", coverage: 10.12, pipeline: pipeline, retried: true)
+      retried  = create(:ci_build, name: "jest", coverage: 20.11, pipeline: pipeline)
+
+      builds = pipeline.builds_with_coverage
+
+      expect(builds).to include(retried)
+      expect(builds).not_to include(obsolete)
+    end
   end
 
   describe '#base_and_ancestors' do