test(brouillon_spec): fix random errors due to db champs not yet updated

spec/system/users/brouillon_spec.rb

@@ -47,8 +47,15 @@ describe 'The user' do
     blur
     expect(page).to have_css('span', text: 'Brouillon enregistré', visible: true)
 
-    # check data on the dossier
-    expect(user_dossier.brouillon?).to be true
+    # check data on the dossier from db
+    # Sometimes, `user_dossier.champs` are not yet all updated with the new values
+    # when we first load `user_dossier`, causing random errors.
+    # Strategy is to retry & reload them if necessary for a few seconds,
+    # and raise expectation error instead of timeout error.
+    last_expection_error = nil
+    begin
+      Timeout.timeout(Capybara.default_max_wait_time) do
+        expect(user_dossier).to be_brouillon
         expect(champ_value_for('text')).to eq('super texte')
         expect(champ_value_for('textarea')).to eq('super textarea')
         expect(champ_value_for('date')).to eq('2012-12-12')
@@ -70,8 +77,17 @@ describe 'The user' do
         expect(champ_value_for('departements')).to eq('02 - Aisne')
         expect(champ_value_for('communes')).to eq('Ambléon (01300)')
         expect(champ_value_for('engagement')).to eq('on')
-    expect(champ_value_for('piece_justificative')).to be_nil # antivirus hasn't approved the file yet
         expect(champ_value_for('dossier_link')).to eq(dossier_to_link.id.to_s)
+        expect(champ_value_for('piece_justificative')).to be_nil # antivirus hasn't approved the file yet
+      rescue RSpec::Expectations::ExpectationNotMetError => e
+        Rails.logger.debug "Error #{e.message.tr("\n", " ")}, will retry"
+        last_expection_error = e
+        sleep(0.1)
+        retry
+      end
+    rescue Timeout::Error => e
+      raise last_expection_error || e
+    end
 
     ## check data on the gui
 
@@ -435,7 +451,7 @@ describe 'The user' do
   end
 
   def champ_value_for(libelle)
-    champs = user_dossier.champs
+    champs = user_dossier.reload.champs
     champs.find { |c| c.libelle == libelle }.value
   end