[#2604] Introduce errors when retrieving ProcedurePresentation

spec/models/assign_to_spec.rb

@@ -1,18 +1,22 @@
 describe AssignTo, type: :model do
-  describe '#procedure_presentation_or_default' do
+  describe '#procedure_presentation_or_default_and_errors' do
     let(:procedure) { create(:procedure) }
     let(:assign_to) { AssignTo.create(procedure: procedure) }
 
-    let(:procedure_presentation_or_default) { assign_to.procedure_presentation_or_default }
+    let(:procedure_presentation_and_errors) { assign_to.procedure_presentation_or_default_and_errors }
+    let(:procedure_presentation_or_default) { procedure_presentation_and_errors.first }
+    let(:errors) { procedure_presentation_and_errors.second }
 
     context "without a procedure_presentation" do
       it { expect(procedure_presentation_or_default).not_to be_persisted }
+      it { expect(errors).to be_nil }
     end
 
     context "with a procedure_presentation" do
       let!(:procedure_presentation) { ProcedurePresentation.create(assign_to: assign_to) }
 
       it { expect(procedure_presentation_or_default).to eq(procedure_presentation) }
+      it { expect(errors).to be_nil }
     end
   end
 end