Refactor assignement-related methods

app/controllers/admin/accompagnateurs_controller.rb

@@ -51,11 +51,17 @@ class Admin::AccompagnateursController < AdminController
 
     case to
     when ASSIGN
-      gestionnaire.assign_to_procedure(procedure)
-      flash.notice = "L'accompagnateur a bien été affecté"
+      if gestionnaire.assign_to_procedure(procedure)
+        flash.notice = "L'accompagnateur a bien été affecté"
+      else
+        flash.alert = "L'accompagnateur a déjà été affecté"
+      end
     when NOT_ASSIGN
-      gestionnaire.remove_from_procedure(procedure)
-      flash.notice = "L'accompagnateur a bien été désaffecté"
+      if gestionnaire.remove_from_procedure(procedure)
+        flash.notice = "L'accompagnateur a bien été désaffecté"
+      else
+        flash.alert = "L'accompagnateur a déjà été désaffecté"
+      end
     end
 
     redirect_to admin_procedure_accompagnateurs_path, procedure_id: params[:procedure_id]

app/models/gestionnaire.rb

@@ -52,11 +52,16 @@ class Gestionnaire < ActiveRecord::Base
   end
 
   def assign_to_procedure(procedure)
-    AssignTo.create(gestionnaire: self, procedure: procedure)
+    begin
+      procedures << procedure
+      true
+    rescue ActiveRecord::RecordNotUnique
+      false
+    end
   end
 
   def remove_from_procedure(procedure)
-    AssignTo.where(gestionnaire: self, procedure: procedure).delete_all
+    !!(procedure.in?(procedures) && procedures.destroy(procedure))
   end
 
   def last_week_overview

spec/models/gestionnaire_spec.rb

@@ -64,6 +64,54 @@ describe Gestionnaire, type: :model do
     end
   end
 
+  describe "#assign_to_procedure" do
+    subject { gestionnaire.assign_to_procedure(procedure_to_assign) }
+
+    context "with a procedure not already assigned" do
+      let(:procedure_to_assign) { procedure_3 }
+
+      it { is_expected.to be_truthy }
+      it { expect{ subject }.to change(gestionnaire.procedures, :count) }
+    end
+
+    context "with an already assigned procedure" do
+      let(:procedure_to_assign) { procedure }
+
+      it { is_expected.to be_falsey }
+      it { expect{ subject }.not_to change(gestionnaire.procedures, :count) }
+    end
+  end
+
+  describe "#remove_from_procedure" do
+    subject { gestionnaire.remove_from_procedure(procedure_to_remove) }
+
+    context "with an assigned procedure" do
+      let(:procedure_to_remove) { procedure }
+      let!(:procedure_presentation) { procedure_assign.procedure_presentation }
+
+      it { is_expected.to be_truthy }
+
+      describe "consequences" do
+        before do
+          procedure_assign.build_procedure_presentation
+          procedure_assign.save
+          subject
+        end
+
+        it "removes the assign_to and procedure_presentation" do
+          expect(AssignTo.where(id: procedure_assign).count).to eq(0)
+          expect(ProcedurePresentation.where(assign_to_id: procedure_assign.id).count).to eq(0)
+        end
+      end
+    end
+
+    context "with an already unassigned procedure" do
+      let(:procedure_to_remove) { procedure_3 }
+
+      it { is_expected.to be_falsey }
+    end
+  end
+
   context 'unified login' do
     it 'syncs credentials to associated user' do
       gestionnaire = create(:gestionnaire)