Valuators access to edit/valute on right phase

When a valuator tries to edit/valuate an investment outside valuating
phase, an explanatory message will be shown along with a redirect to
prevent access.

spec/features/valuation/budget_investments_spec.rb

@@ -406,5 +406,39 @@ feature 'Valuation budget investments' do
       expect(page).to have_content('2 errors')
       expect(page).to have_content('Only integer numbers', count: 2)
     end
+
+    scenario 'not visible to valuators when budget is not valuating' do
+      budget.update(phase: 'publishing_prices')
+
+      investment = create(:budget_investment,
+                           :visible_to_valuators,
+                           budget: budget)
+      investment.valuators << [valuator]
+
+      login_as(valuator.user)
+      visit edit_valuation_budget_budget_investment_path(budget, investment)
+
+      expect(page).to have_content('Investments can only be valuated when Budget is in valuating phase')
+    end
+
+    scenario 'visible to admins regardless of not being in valuating phase' do
+      budget.update(phase: 'publishing_prices')
+
+      user = create(:user)
+      admin = create(:administrator, user: user)
+      valuator = create(:valuator, user: user)
+
+      investment = create(:budget_investment,
+                           :visible_to_valuators,
+                           budget: budget)
+      investment.valuators << [valuator]
+
+
+      login_as(admin.user)
+      visit valuation_budget_budget_investment_path(budget, investment)
+      click_link 'Edit dossier'
+
+      expect(page).to have_content investment.title
+    end
   end
 end