do not display alert when supporting for whole city

app/helpers/budgets_helper.rb

@@ -90,4 +90,10 @@ module BudgetsHelper
       t("admin.budgets.winners.recalculate")
     end
   end
+
+  def display_support_alert?(investment)
+    current_user &&
+    !current_user.voted_in_group?(investment.group) &&
+    investment.group.headings.count > 1
+  end
 end

app/views/budgets/investments/_votes.html.erb

@@ -18,8 +18,9 @@
           class: "button button-support small expanded",
           title: t('budgets.investments.investment.support_title'),
           method: "post",
-          remote: (current_user && current_user.voted_in_group?(investment.group) ? true : false),
+          remote: (display_support_alert?(investment) ? false: true ),
-          data:   (current_user && current_user.voted_in_group?(investment.group) ? nil : { confirm: t('budgets.investments.investment.confirm_group', count: investment.group.max_votable_headings)} ),
+          data:   (display_support_alert?(investment) ? {
+                  confirm: t("budgets.investments.investment.confirm_group")} : nil),
           "aria-hidden" => css_for_aria_hidden(reason) do %>
         <%= t("budgets.investments.investment.give_support") %>
       <% end %>

spec/features/budgets/investments_spec.rb

@@ -1307,6 +1307,7 @@ feature 'Budget Investments' do
         carabanchel_investment = create(:budget_investment, :selected, heading: carabanchel)
         salamanca_investment   = create(:budget_investment, :selected, heading: salamanca)
 
+        login_as(author)
         visit budget_investments_path(budget, heading_id: carabanchel.id)
 
         within("#budget_investment_#{carabanchel_investment.id}") do
@@ -1332,21 +1333,35 @@ feature 'Budget Investments' do
       end
 
       scenario "When supporting in another group", :js do
-        carabanchel     = create(:budget_heading, group: group)
+        heading = create(:budget_heading, group: group)
-        another_heading = create(:budget_heading, group: create(:budget_group, budget: budget))
 
-        carabanchel_investment   = create(:budget_investment, heading: carabanchel)
+        group2 = create(:budget_group, budget: budget)
-        another_group_investment = create(:budget_investment, heading: another_heading)
+        another_heading1 = create(:budget_heading, group: group2)
+        another_heading2 = create(:budget_heading, group: group2)
 
-        create(:vote, votable: carabanchel_investment, voter: author)
+        heading_investment   = create(:budget_investment, heading: heading)
+        another_group_investment = create(:budget_investment, heading: another_heading1)
+
+        create(:vote, votable: heading_investment, voter: author)
 
         login_as(author)
-        visit budget_investments_path(budget, heading_id: another_heading.id)
+        visit budget_investments_path(budget, heading_id: another_heading1.id)
 
         within("#budget_investment_#{another_group_investment.id}") do
           expect(page).to have_css(".in-favor a[data-confirm]")
         end
       end
+
+      scenario "When supporting in a group with a single heading", :js do
+        all_city_investment = create(:budget_investment, heading: heading)
+
+        login_as(author)
+        visit budget_investments_path(budget, heading_id: heading.id)
+
+        within("#budget_investment_#{all_city_investment.id}") do
+          expect(page).not_to have_css(".in-favor a[data-confirm]")
+        end
+      end
     end
 
     scenario "Sidebar in show should display support text" do