Add empty case in operation_spec.rb

spec/cfonb/operation_spec.rb

@@ -276,23 +276,34 @@
     context 'with an unknown detail' do
       let(:detail) do
         OpenStruct.new(
-          body: '0530004411001871EUR2 0001016255614090823     AAAEUR200000000000740',
-          detail_code: 'AAA',
+          body: '0530004411001871EUR2 0001016255614090823     A AEUR200000000000740',
+          detail_code: 'A A',
           detail: 'EUR200000000000740',
         )
       end
 
       it 'adds the detail to the unknown details hash' do
         operation.merge_detail(detail)
 
-        expect(operation.details.unknown).to eq({ 'AAA' => 'EUR200000000000740' })
+        expect(operation.details.unknown).to eq({ 'A_A' => 'EUR200000000000740' })
       end
 
       it 'updates the current details in case of duplicated codes' do
         operation.merge_detail(detail)
         operation.merge_detail(detail)
 
-        expect(operation.details.unknown).to eq({ 'AAA' => "EUR200000000000740\nEUR200000000000740" })
+        expect(operation.details.unknown).to eq({ 'A_A' => "EUR200000000000740\nEUR200000000000740" })
+      end
+
+      it 'does not add any detail if they are empty' do
+        detail = OpenStruct.new(
+          body: '0530004411001871EUR2 0001016255614090823',
+          detail_code: '',
+          detail: 'EUR200000000000740',
+        )
+        operation.merge_detail(detail)
+
+        expect(operation.details.unknown).to be_nil
       end
     end
   end