new_contents: import unittest
  
  import needy.process
  
  
  class ProcessTest(unittest.TestCase):
  
      def test_list_command_output(self):
          self.assertEqual('hello', needy.process.command_output(['printf', 'hello']))
  
      def test_shell_command_output(self):
          self.assertEqual('hello', needy.process.command_output('printf `printf hello`'))
  
subject: add process test