Add budget stats permissions for normal users and admins

spec/features/budgets/stats_spec.rb

@@ -0,0 +1,37 @@
+require "rails_helper"
+
+feature "Stats" do
+
+  let(:budget)  { create(:budget) }
+  let(:group)   { create(:budget_group, budget: budget) }
+  let(:heading) { create(:budget_heading, group: group, price: 1000) }
+
+  describe "Show" do
+
+    it "is not accessible to normal users if phase is not 'finished'" do
+      budget.update(phase: "reviewing_ballots")
+
+      visit budget_stats_path(budget.id)
+      expect(page).to have_content "You do not have permission to carry out the action "\
+                                   "'read_stats' on budget."
+    end
+
+    it "is accessible to normal users if phase is 'finished'" do
+      budget.update(phase: "finished")
+
+      visit budget_stats_path(budget.id)
+      expect(page).to have_content "Stats"
+    end
+
+    it "is accessible to administrators when budget has phase 'reviewing_ballots'" do
+      budget.update(phase: "reviewing_ballots")
+
+      login_as(create(:administrator).user)
+
+      visit budget_stats_path(budget.id)
+      expect(page).to have_content "Stats"
+    end
+
+  end
+
+end