Add tests for renaming behaviour in TopicsMutator

Author: Oli0li

spec/services/topics/mutator_spec.rb

@@ -24,7 +24,7 @@
       [
         ActiveStorage::Blob.create_and_upload!(
           io: StringIO.new("dummy content"),
-          filename: "dummy.pdf",
+          filename: "rename_dummy.pdf",
           content_type: "application/pdf",
         ).signed_id,
       ]
@@ -41,6 +41,7 @@
         document_id: created_topic.documents.first.id,
         action: "update",
       )
+      expect(created_topic.reload.documents.first.blob.filename.to_s).to eq("#{created_topic.id}_prefix_2023_1_dummy.pdf")
     end
   end
 
@@ -87,6 +88,10 @@
         expect(updated_topic).to be_persisted
         expect(updated_topic.description).to eq("many topic details")
       end
+
+      it "does not rename existing documents" do
+        expect { subject.update }.not_to change { topic.reload.documents.first.blob.filename.to_s }.from("test_image.png")
+      end
     end
   end