new_contents: #!/usr/bin/env python
  # -*- coding: utf-8; mode: python; -*-
  
  ##################################################################
  # Imports
  from __future__ import absolute_import
  
  from dsenser.constants import CONNECTIVE, TOK_LIST
  from dsenser.utils import singleton, is_explicit
  
  
  ##################################################################
  # Auxiliary Class
  @singleton
  class Aux(object):
      m1 = 3
  
  
  ##################################################################
  # Test Classes
  def test_singleton():
      a1 = Aux
      a2 = Aux
      assert a1.m1 == 3
      assert a2.m1 == 3
      assert a1 is a2
  
  
  def test_is_explicit():
      assert is_explicit({CONNECTIVE: {TOK_LIST: [1, 2, 3]}})
      assert is_explicit({CONNECTIVE: {TOK_LIST: []}}) is False
  
subject: test utils added