Add coverage for StatusTrend.allowed method (#39239)

spec/models/status_trend_spec.rb

@@ -9,4 +9,23 @@ RSpec.describe StatusTrend do
     it { is_expected.to belong_to(:account).required }
     it { is_expected.to belong_to(:status).required }
   end
+
+  describe 'Scopes' do
+    describe '.allowed' do
+      context 'with multiple trends per account' do
+        let(:account) { Fabricate :account }
+        let!(:allowed_high_score) { Fabricate :status_trend, allowed: true, score: 10, account: }
+
+        before do
+          Fabricate :status_trend, allowed: false, score: 25
+          Fabricate :status_trend, allowed: true, score: 2, account:
+        end
+
+        it 'returns allowed records with account grouped max scores' do
+          expect(described_class.allowed)
+            .to contain_exactly(eq(allowed_high_score).and(have_attributes(score: 10)))
+        end
+      end
+    end
+  end
 end