Improve user calendar authentification and tests

app/controllers/users_controller.rb

 class UsersController < ApplicationController
+  skip_before_filter :authenticate_user!
+  before_filter :set_user
   layout :determine_layout
 
   def show
@@ -47,7 +49,7 @@ class UsersController < ApplicationController
 
   private
 
-  def authenticate_user!
+  def set_user
     @user = User.find_by_username!(params[:username])
 
     unless current_user || @user.public_profile?

spec/controllers/users_controller_spec.rb

@@ -9,18 +9,18 @@ describe UsersController do
 
   describe "GET #show" do
     render_views
-    before do
-      get :show, username: user.username
-    end
 
     it "renders the show template" do
+      get :show, username: user.username
       expect(response.status).to eq(200)
       expect(response).to render_template("show")
     end
+  end
 
+  describe "GET #calendar" do
     it "renders calendar" do
-      controller.prepend_view_path 'app/views/users'
-      expect(response).to render_template("_calendar")
+      get :calendar, username: user.username
+      expect(response).to render_template("calendar")
     end
   end
 end