Dossier: move state translation to model dossier

app/models/dossier.rb

@@ -277,6 +277,23 @@ class Dossier < ApplicationRecord
     DossierMailer.notify_deletion_to_user(deleted_dossier, user.email).deliver_later
   end
 
+  def old_state_value
+    case state
+    when Dossier.states.fetch(:en_construction)
+      'initiated'
+    when Dossier.states.fetch(:en_instruction)
+      'received'
+    when Dossier.states.fetch(:accepte)
+      'closed'
+    when Dossier.states.fetch(:refuse)
+      'refused'
+    when Dossier.states.fetch(:sans_suite)
+      'without_continuation'
+    else
+      state
+    end
+  end
+
   private
 
   def update_state_dates

app/serializers/dossier_serializer.rb

@@ -43,20 +43,7 @@ class DossierSerializer < ActiveModel::Serializer
   end
 
   def state
-    case object.state
+    object.old_state_value
-    when Dossier.states.fetch(:en_construction)
-      'initiated'
-    when Dossier.states.fetch(:en_instruction)
-      'received'
-    when Dossier.states.fetch(:accepte)
-      'closed'
-    when Dossier.states.fetch(:refuse)
-      'refused'
-    when Dossier.states.fetch(:sans_suite)
-      'without_continuation'
-    else
-      object.state
-    end
   end
 
   def simplified_state

spec/models/dossier_spec.rb

@@ -1004,4 +1004,32 @@ describe Dossier do
       it { expect(long_expired_dossier).to be_retention_expired }
     end
   end
+
+  describe 'old_state_value' do
+    subject { dossier.old_state_value }
+
+    context 'when the dossier is en instruction' do
+      let(:dossier) { create(:dossier, :en_instruction) }
+
+      it { is_expected.to eq('received') }
+    end
+
+    context 'when the dossier is accepte' do
+      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:accepte)) }
+
+      it { is_expected.to eq('closed') }
+    end
+
+    context 'when the dossier is refuse' do
+      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:refuse)) }
+
+      it { is_expected.to eq('refused') }
+    end
+
+    context 'when the dossier is sans_suite' do
+      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:sans_suite)) }
+
+      it { is_expected.to eq('without_continuation') }
+    end
+  end
 end

spec/serializers/dossier_serializer_spec.rb

@@ -13,25 +13,6 @@ describe DossierSerializer do
       let(:dossier) { create(:dossier, :en_instruction) }
 
       it { is_expected.to include(received_at: dossier.en_instruction_at) }
-      it { is_expected.to include(state: 'received') }
-    end
-
-    context 'when the dossier is accepte' do
-      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:accepte)) }
-
-      it { is_expected.to include(state: 'closed') }
-    end
-
-    context 'when the dossier is refuse' do
-      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:refuse)) }
-
-      it { is_expected.to include(state: 'refused') }
-    end
-
-    context 'when the dossier is sans_suite' do
-      let(:dossier) { create(:dossier, state: Dossier.states.fetch(:sans_suite)) }
-
-      it { is_expected.to include(state: 'without_continuation') }
     end
   end
 end