adds pagination to debates#index

Ref: #80

app/controllers/debates_controller.rb

@@ -5,7 +5,7 @@ class DebatesController < ApplicationController
   respond_to :html, :js
 
   def index
-    @debates = Debate.includes(:tags).search(params)
+    @debates = Debate.includes(:tags).search(params).page(params[:page])
     set_debate_votes(@debates)
   end
 

app/views/debates/index.html.erb

@@ -75,6 +75,7 @@
   <div class="row">
     <div id="debates" class="debates-list small-12 medium-9 column">
       <%= render @debates %>
+      <%= paginate @debates %>
     </div>
     <div class="small-12 medium-3 column">
       <aside class="sidebar" role="complementary">

spec/features/debates_spec.rb

@@ -16,6 +16,24 @@ feature 'Debates' do
     end
   end
 
+  scenario 'Paginated Index' do
+    per_page = Kaminari.config.default_per_page
+    (per_page + 2).times { create(:debate) }
+
+    visit debates_path
+
+    expect(page).to have_selector('#debates .debate', count: per_page)
+
+    within("nav.pagination") do
+      expect(page).to have_content("1")
+      expect(page).to have_content("2")
+      expect(page).to_not have_content("3")
+      click_link "Next"
+    end
+
+    expect(page).to have_selector('#debates .debate', count: 2)
+  end
+
   scenario 'Show' do
     debate = create(:debate)