Add missing feature flag detection specs

spec/controllers/admin/budget_investments_controller_spec.rb

@@ -2,6 +2,14 @@ require "rails_helper"
 
 describe Admin::BudgetInvestmentsController, :admin do
   describe "GET index" do
+    it "raises an exception when the feature is disabled" do
+      Setting["process.budgets"] = false
+
+      expect do
+        get :index, params: { budget_id: create(:budget).id }
+      end.to raise_exception(FeatureFlags::FeatureDisabled)
+    end
+
     it "raises an error if budget slug is not found" do
       expect do
         get :index, params: { budget_id: "wrong_budget" }

spec/controllers/budgets/investments_controller_spec.rb

@@ -1,6 +1,16 @@
 require "rails_helper"
 
 describe Budgets::InvestmentsController do
+  describe "GET index" do
+    it "raises an exception when the feature is disabled" do
+      Setting["process.budgets"] = false
+
+      expect do
+        get :index, params: { budget_id: create(:budget).id }
+      end.to raise_exception(FeatureFlags::FeatureDisabled)
+    end
+  end
+
   describe "GET show" do
     let(:investment) { create(:budget_investment) }
 

spec/controllers/budgets_controller_spec.rb

@@ -1,6 +1,14 @@
 require "rails_helper"
 
 describe BudgetsController do
+  describe "GET index" do
+    it "raises an exception when the feature is disabled" do
+      Setting["process.budgets"] = false
+
+      expect { get :index }.to raise_exception(FeatureFlags::FeatureDisabled)
+    end
+  end
+
   describe "GET show" do
     it "raises an error if budget slug is not found" do
       expect do