Implements OPTIONS http verb for root path

close #294

app/controllers/home_controller.rb

@@ -1,6 +1,14 @@
 class HomeController < ApplicationController
+  before_filter :respond_to_options
+
   def index
     @today = Date.current
     @current = Conference.where("end_date >= ?", @today).order("start_date ASC")
   end
+
+  def respond_to_options
+    respond_to do |format|
+      format.html { head :ok }
+    end if request.options?
+  end
 end

config/routes.rb

@@ -114,6 +114,5 @@ Osem::Application.routes.draw do
 
   get "/admin" => redirect("/admin/conference")
 
-  root :to => "home#index"
+  root to: 'home#index', via: [:get, :options]
-
 end

spec/controllers/home_controller_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe HomeController do
+  let(:conference) { create(:conference) }
+  describe 'GET #index' do
+    it 'Response code is 200' do
+      get :index
+      expect(response.response_code).to eq(200)
+    end
+
+    it 'Assigns conference' do
+      get :index
+      expect(assigns(:current)).to eq [conference]
+    end
+
+    it 'Assigns only pending conferences' do
+      create(:conference,
+             end_date: Date.today - 7,
+             start_date: Date.today - 14)
+      get :index
+      expect(assigns(:current)).to eq [conference]
+    end
+
+  end
+
+  describe 'OPTIONS #index' do
+    it 'Response code is 200' do
+      process :index, 'OPTIONS'
+      expect(response.response_code).to eq(200)
+    end
+  end
+end