new_contents: #! /usr/bin/python
  
  from packager.core.flavor import debian_check
  from nose.tools import *
  from subprocess import call
  
  def test_debian_check():
      ret = call(["test", "-f", "/etc/debian_version"]) == 0
      assert debian_check() == ret
  
subject: Add unit test for packager.core.flavor.py