select_multiple: add decoration for view of multiple_select

app/decorators/champ_decorator.rb

@@ -2,9 +2,8 @@ class ChampDecorator < Draper::Decorator
   delegate_all
 
   def value
-    if type_champ == 'checkbox'
-      return object.value == 'on' ? 'Oui' : 'Non'
-    end
+    return object.value == 'on' ? 'Oui' : 'Non' if type_champ == 'checkbox'
+    return JSON.parse(object.value).join(', ')  if type_champ == 'multiple_drop_down_list' && !object.value.blank?
     object.value
   end
 

spec/decorators/champ_decorator_spec.rb

@@ -1,19 +1,18 @@
 require 'spec_helper'
 
 describe ChampDecorator do
-  let(:champ) {create :champ, type_de_champ: (create :type_de_champ_public, type_champ: :checkbox)}
+  let(:champ) {create :champ, type_de_champ: (create :type_de_champ_public, type_champ: type_champ)}
   let(:decorator) { champ.decorate }
 
+
   describe 'value' do
     subject { decorator.value }
 
-    context 'when type_champ is checkbox' do
+    describe 'for a checkbox' do
+      let(:type_champ) { :checkbox }
 
       context 'when value is on' do
-        before do
-          champ.update value: 'on'
-        end
-
+        before { champ.update value: 'on' }
         it { is_expected.to eq 'Oui' }
       end
 
@@ -21,5 +20,19 @@ describe ChampDecorator do
         it { is_expected.to eq 'Non' }
       end
     end
+
+    describe 'for a multiple_drop_down_list' do
+      let(:type_champ) { :multiple_drop_down_list }
+
+      context 'when value is an array' do
+        before { champ.update value: '["1", "2"]' }
+        it { is_expected.to eq '1, 2' }
+      end
+
+      context 'when value is empty' do
+        before { champ.update value: '' }
+        it { is_expected.to eq '' }
+      end
+    end
   end
 end