close issue hacketyhack#119, fix for programs without username

app/helpers/programs_helper.rb

@@ -1,9 +1,14 @@
 module ProgramsHelper
   def program_link program
-    "#{link_to(program.title.titleize, user_program_path(program.author_username, program))}".html_safe
+    if program.author_username.present?
+      "#{link_to(program.title.titleize, user_program_path(program.author_username, program))}".html_safe
+    else
+      "#{link_to(program.title.titleize, url_for(:controller => '/programs', :action => 'show', :id => program.slug))}".html_safe
+    end
   end
 
   def author_link username, program = nil
+    return nil unless username
     output = ""
     output += link_to(username, user_path(username))
 

spec/views/programs_index.rb

@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe 'programs/index.html.haml' do
+   context 'programs without a username' do
+     it "renders the page without error" do
+       programs = [Fabricate(:program, author_username: nil)]
+       assign(:programs, programs)
+       render
+       rendered.should have_selector('div', id: 'title', contents: 'MyString')
+     end
+   end
+end