Merge pull request #1573 from consul/budgets-back-link

adds heading_id on investment show back link

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

@@ -2,7 +2,7 @@
 
   <div class="row">
     <div class="small-12 medium-9 column">
-      <%= back_link_to budget_investments_path(investment.budget) %>
+      <%= back_link_to budget_investments_path(heading_id: investment.heading.id) %>
 
       <h1><%= investment.title %></h1>
 

spec/features/budgets/investments_spec.rb

@@ -278,6 +278,13 @@ feature 'Budget Investments' do
     end
   end
 
+  scenario "Show back link contains heading id" do
+    investment = create(:budget_investment, heading: heading)
+    visit budget_investment_path(budget, investment)
+
+    expect(page).to have_link "Go back", href: budget_investments_path(budget, heading_id: heading.id)
+  end
+
   context "Show (feasible budget investment)" do
     let(:investment) { create(:budget_investment,
                           :feasible,