#132 fixed and tested

Author: yegor256

sixnines.rb

@@ -363,7 +363,7 @@
   file = File.join('assets/sass', "#{name}.sass")
   error(404, "File not found: #{file}") unless File.exist?(file)
   content_type 'text/css', charset: 'utf-8'
-  Sass::Engine.new(file).render
+  Sass::Engine.new(File.read(file)).render
 end
 
 not_found do

test/test_sixnines.rb

@@ -45,6 +45,8 @@ def test_robots_txt
   def test_css
     get('/css/main.css')
     assert(last_response.ok?)
+    assert(!last_response.body.empty?)
+    assert(last_response.body.include?('body {'), last_response.body)
   end
 
   def test_it_renders_home_page