#helper method for output tests
def capture_log
  origin = $stdout
  $stdout = StringIO.new
  yield
  $stdout = origin
end

#helper method for clearing temp directory
def clear_tmp
  Dir.chdir $default[:dir]
  FileUtils.rm_rf 'tmp' if File.directory?  'tmp'
  Dir.mkdir 'tmp'
  Dir.chdir 'tmp'
end