Switch on ratifying provider description in API response

app/serializers/api/public/v1/serializable_course.rb

@@ -54,7 +54,11 @@ def enrichment_attribute(name, enrichment_name = name)
                    :degree_type
 
         attribute :about_accredited_body do
-          @object.accrediting_provider_description
+          if Settings.features.provider_partnerships
+            @object.ratifying_provider_description
+          else
+            @object.accrediting_provider_description
+          end
         end
 
         attribute :accredited_body_code do

spec/serializers/api/public/v1/serializable_course_spec.rb

@@ -17,12 +17,22 @@
 
   context 'when there is an accredited body with enrichments' do
     before do
+      allow(Settings.features).to receive(:provider_partnerships).and_return(false)
       course.provider.update(accrediting_provider_enrichments: [{ Description: 'foo', UcasProviderCode: course.accrediting_provider.provider_code }])
     end
 
     it { is_expected.to have_attribute(:about_accredited_body).with_value(course.provider.accrediting_provider_enrichments.first.Description) }
   end
 
+  context 'when there is a ratifying provider with description' do
+    before do
+      allow(Settings.features).to receive(:provider_partnerships).and_return(true)
+      course.provider.accredited_partnerships.create(description: 'foo', accredited_provider: course.accrediting_provider)
+    end
+
+    it { is_expected.to have_attribute(:about_accredited_body).with_value(course.provider.accredited_partnerships.find_by(accredited_provider_id: course.accrediting_provider).description) }
+  end
+
   it { is_expected.to have_attribute(:about_accredited_body).with_value(nil) }
   it { is_expected.to have_attribute(:about_course).with_value(course.latest_published_enrichment.about_course) }
   it { is_expected.to have_attribute(:accredited_body_code).with_value(course.accredited_provider_code) }