Fix sentry issue #2139 when published_at is nil

app/decorators/procedure_decorator.rb

@@ -10,8 +10,10 @@ class ProcedureDecorator < Draper::Decorator
   end
 
   def published_at_fr
+    if published_at.present?
       published_at.localtime.strftime('%d/%m/%Y %H:%M')
     end
+  end
 
   def logo_img
     if logo.blank?

spec/decorators/procedure_decorator_spec.rb

@@ -1,7 +1,10 @@
 require 'spec_helper'
 
 describe ProcedureDecorator do
-  let(:procedure) { create(:procedure, :published, created_at: Time.new(2015, 12, 24, 14, 10)) }
+  let(:published_at) { Time.new(2017, 12, 24, 14, 12) }
+  let(:procedure) { create(:procedure, published_at: published_at, created_at: Time.new(2015, 12, 24, 14, 10)) }
+  let!(:procedure_path) { create(:procedure_path, administrateur: create(:administrateur), procedure: procedure) }
+
   subject { procedure.decorate }
 
   describe 'lien' do
@@ -14,6 +17,16 @@ describe ProcedureDecorator do
     it { is_expected.to eq('24/12/2015 14:10') }
   end
 
+  describe 'published_at_fr' do
+    subject { super().published_at_fr }
+    it { is_expected.to eq('24/12/2017 14:12') }
+
+    context 'published_at is nil' do
+      let(:published_at) { nil }
+      it { is_expected.to eq(nil) }
+    end
+  end
+
   describe 'logo_img' do
     subject { super().logo_img }
     it { is_expected.to match(/http.*#{ActionController::Base.helpers.image_url(LOGO_NAME)}/) }