new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import mock
  
  import six
  
  from cliff.formatters import commaseparated
  
  
  def test_commaseparated_list_formatter():
      sf = commaseparated.CSVLister()
      c = ('a', 'b', 'c')
      d1 = ('A', 'B', 'C')
      d2 = ('D', 'E', 'F')
      data = [d1, d2]
      expected = 'a,b,c\nA,B,C\nD,E,F\n'
      output = six.StringIO()
      parsed_args = mock.Mock()
      parsed_args.quote_mode = 'none'
      sf.emit_list(c, data, output, parsed_args)
      actual = output.getvalue()
      assert expected == actual
  
  
  def test_commaseparated_list_formatter_unicode():
      sf = commaseparated.CSVLister()
      c = (u'a', u'b', u'c')
      d1 = (u'A', u'B', u'C')
      happy = u'高兴'
      d2 = (u'D', u'E', happy)
      data = [d1, d2]
      expected = u'a,b,c\nA,B,C\nD,E,%s\n' % happy
      output = six.StringIO()
      parsed_args = mock.Mock()
      parsed_args.quote_mode = 'none'
      sf.emit_list(c, data, output, parsed_args)
      actual = output.getvalue()
      if six.PY2:
          actual = actual.decode('utf-8')
      assert expected == actual
  
subject: Add csv formatter test