fix a bug and give a message when the cache is building

lib/jasmine/files_list.rb

@@ -1,5 +1,6 @@
 require 'jasmine-core'
 require 'iconv'
+require 'time'
 
 module Jasmine
   class FilesList
@@ -11,6 +12,8 @@ module Jasmine
       File.expand_path('../../../jasmine/jasmine.headless-reporter.js', __FILE__)
     ]
 
+    PLEASE_WAIT_IM_WORKING_TIME = 2
+
     def initialize(options = {})
       @options = options
       @files = DEFAULT_FILES.dup
@@ -50,7 +53,14 @@ module Jasmine
 
     private
     def to_html(files)
+      alert_time = Time.now + PLEASE_WAIT_IM_WORKING_TIME
+
       files.collect { |file|
+        if alert_time && alert_time < Time.now
+          puts "Rebuilding cache, please wait..."
+          alert_time = nil
+        end
+
         case File.extname(file)
         when '.coffee'
           begin
@@ -67,7 +77,7 @@ module Jasmine
         when '.css'
           %{<link rel="stylesheet" href="#{file}" type="text/css" />}
         end
-      }.flatten.reject(&:empty?)
+      }.flatten.compact.reject(&:empty?)
     end
 
     def spec_filter

spec/lib/jasmine/files_list_spec.rb

@@ -151,6 +151,7 @@ describe Jasmine::FilesList do
       files_list.instance_variable_set(:@files, [
                                        'test.js',
                                        'test.coffee',
+                                       'test.whatever',
                                        'test.css'
       ])