new_contents: from unittest import TestCase
  from vCenterShell.network.dvswitch.name_generator import DvPortGroupNameGenerator
  
  
  class TestDvPortGroupCreator(TestCase):
      def test_name(self):
          # arrange
          gen = DvPortGroupNameGenerator()
  
          # act
          name = gen.generate_port_group_name('id')
  
          # assert
          self.assertEqual('VLAN id', name)
  
subject: add test