new_contents: """ 
  Unit tests for the field module.
  
  Thomas Ogden <t@ogden.eu>
  
  """
  
  import unittest
  
  from maxwellbloch import field
  
  class TestInit(unittest.TestCase):
  
      def test_init_default(self):
          """  Test Default Initialise """ 
  
          field_00 = field.Field()
  
          self.assertEqual(field_00.label, '')
          self.assertEqual(field_00.coupled_levels, [])
          self.assertEqual(field_00.detuning, 0.0)
          self.assertEqual(field_00.detuning_positive, True)
          self.assertEqual(field_00.rabi_freq, 0.0)
          self.assertEqual(field_00.rabi_freq_t_func, None)
          self.assertEqual(field_00.rabi_freq_t_args, {})
  
  def main():
      unittest.main(verbosity=3)
  
  if __name__ == "__main__":
      status = main()
      sys.exit(status)
subject: Add Field default init test