fix(api_entreprise): don't fail with entreprise without date_creation

app/lib/api_entreprise/entreprise_adapter.rb

@@ -10,7 +10,7 @@ class APIEntreprise::EntrepriseAdapter < APIEntreprise::Adapter
     params[:etat_administratif] = map_etat_administratif(data_source)
 
     if params.present? && valid_params?(params)
-      params[:date_creation] = Time.zone.at(params[:date_creation]).to_datetime
+      params[:date_creation] = Time.zone.at(params[:date_creation]).to_datetime if params[:date_creation].present?
       params.transform_keys { |k| :"entreprise_#{k}" }
     else
       {}

spec/lib/api_entreprise/entreprise_adapter_spec.rb

@@ -72,6 +72,18 @@ describe APIEntreprise::EntrepriseAdapter do
         expect(subject[:entreprise_etat_administratif]).to eq('actif')
       end
     end
+
+    context "when date_creation is empty" do
+      let(:body) do
+        hash = JSON.parse(super())
+        hash["entreprise"]["date_creation"] = nil
+        JSON.generate(hash)
+      end
+
+      it 'L\'entreprise ne contient pas de date_creation' do
+        expect(subject[:entreprise_date_creation]).to be_nil
+      end
+    end
   end
 
   context "when the SIRET is unknown" do