Checkbox should be checked when value is 'on'

app/views/users/description/champs/_checkbox.html.haml

@@ -1,2 +1 @@
-%input{type: 'hidden', name:"champs['#{champ.id}']", id: "champs_#{champ.id}", value: ''}
-%input{type: 'checkbox', style:'margin-left: 15px;', name:"champs['#{champ.id}']", id: "champs_#{champ.id}", checked: ('checked' if champ.value == 'on')}
+%input{type: 'checkbox', style:'margin-left: 15px;', name:"champs['#{champ.id}']", id: "champs_#{champ.id}", checked: ('checked' if champ.object.value == 'on')}

spec/factories/type_de_champ_public.rb

@@ -5,5 +5,9 @@ FactoryGirl.define do
     type_champ 'text'
     order_place 1
     mandatory false
+
+    trait :checkbox do
+      type_champ 'checkbox'
+    end
   end
 end

spec/views/users/description/champs/_render_list_champs.html.haml_spec.rb

@@ -0,0 +1,27 @@
+describe 'users/description/champs/render_list_champs.html.haml', type: :view do
+  let(:type_champ) { create(:type_de_champ_public, :checkbox) }
+
+  context "with a checkbox champ with value equals nil" do
+    let!(:champ_checkbox_checked) { create(:champ, type_de_champ: type_champ, value: nil) }
+
+    before do
+      render 'users/description/champs/render_list_champs.html.haml', champs: Champ.all, order_place: 0
+    end
+
+    it 'should not render a checked checkbox' do
+      expect(rendered).not_to have_css('input[type=checkbox][checked]')
+    end
+  end
+
+  context "with a checkbox champ with value equals 'on'" do
+    let!(:champ_checkbox_checked) { create(:champ, type_de_champ: type_champ, value: 'on') }
+
+    before do
+      render 'users/description/champs/render_list_champs.html.haml', champs: Champ.all, order_place: 0
+    end
+
+    it 'should render a checked checkbox' do
+      expect(rendered).to have_css('input[type=checkbox][checked]')
+    end
+  end
+end