module Rake

def add_rakelib(*files)

Add files to the rakelib list 
def add_rakelib(*files)
  application.options.rakelib ||= []
  files.each do |file|
    application.options.rakelib << file
  end
end

def application

Current Rake Application 
def application
  @application ||= Rake::Application.new
end

def application=(app)

Set the current Rake application object. 
def application=(app)
  @application = app
end

def each_dir_parent(dir) # :nodoc:

:nodoc:
Yield each file or directory component. 
def each_dir_parent(dir)    # :nodoc:
  old_length = nil
  while dir != '.' && dir.length != old_length
    yield(dir)
    old_length = dir.length
    dir = File.dirname(dir)
  end
end

def glob(pattern, *args)

the files returned are guaranteed to be sorted.
should be prefered to Dir[pattern] and Dir.glob[pattern] because
Get a sorted list of files matching the pattern. This method 
def glob(pattern, *args)
  Dir.glob(pattern, *args).sort
end

def load_rakefile(path)

Load a rakefile. 
def load_rakefile(path)
  load(path)
end

def original_dir

Return the original directory where the Rake application was started. 
def original_dir
  application.original_dir
end

def run_tests(pattern='test/test*.rb', log_enabled=false) 

def run_tests(pattern='test/test*.rb', log_enabled=false)
  Rake.glob(pattern).each { |fn|
    $stderr.puts fn if log_enabled
    begin
      require fn
    rescue Exception => ex
      $stderr.puts "Error in #{fn}: #{ex.message}"
      $stderr.puts ex.backtrace
      assert false
    end
  }
end