fix tests

app/logical/popular_search_service.rb

@@ -23,6 +23,8 @@ class PopularSearchService
   end
 
   def fetch_data
+    return [] unless self.class.enabled?
+    
     dates = date.strftime("%Y-%m-%d")
 
     Cache.get("ps-day-#{dates}", 1.minute) do

test/functional/posts_controller_test.rb

@@ -3,6 +3,8 @@ require "test_helper"
 class PostsControllerTest < ActionDispatch::IntegrationTest
   context "The posts controller" do
     setup do
+      PopularSearchService.stubs(:enabled?).returns(false)
+      
       @user = travel_to(1.month.ago) {create(:user)}
       as_user do
         @post = create(:post, :tag_string => "aaaa")