fix(adresse): fallback to city name if commune not found

app/services/api_geo_service.rb

@@ -101,7 +101,7 @@ class APIGeoService
           department_code:,
           region_name: region_name(region_code),
           region_code:,
-          city_name: commune_name(department_code, city_code),
+          city_name: commune_name(department_code, city_code) || properties['city'], # fallback to city name if commune not found
           city_code:
         }
       else

spec/services/api_geo_service_spec.rb

@@ -87,4 +87,24 @@ describe APIGeoService do
       expect(APIGeoService.epcis('01').first).to eq(code: '200042935', name: 'CA Haut - Bugey Agglomération')
     end
   end
+
+  describe 'parse_ban_address' do
+    let(:features) { JSON.parse(Rails.root.join('spec/fixtures/files/api_address/address.json').read)['features'] }
+    let(:feature) { features.first }
+    subject { APIGeoService.parse_ban_address(feature) }
+
+    context 'with a valid code insee' do
+      it { expect(subject[:city_name]).to eq('Paris') }
+    end
+
+    context 'with an invalid code insee' do
+      let(:feature) do
+        features.first.tap {
+          _1['properties']['citycode'] = '0000'
+        }
+      end
+
+      it { expect(subject[:city_name]).to eq('Paris') }
+    end
+  end
 end