old_contents: '''
      Creates all tests to serialize XMLs to xml_curl
  '''
  import logging
  
  import pytest
  from lxml import etree
  from mock import Mock
  
  from wirecurly.directory import Domain, User
     
  def test_domain_no_users():
      domain = Domain('wirephone.com.ar')
      response = domain.todict()
      assert domain.domain == 'wirephone.com.ar'
      assert len(response['children']) == 0
      assert not domain.users
  
  def test_domain_1_user():
      domain = Domain('wirephone.com.ar')
      user = Mock(User)
      domain.addUser(user)
      
      assert domain.users
      assert len(domain.users) == 1
      assert domain.users[0] == user
      response = domain.todict()
      assert len(response['children']) == 1
      assert response.get('children')[0] == user.todict()
  
new_contents: '''
      Creates all tests to serialize XMLs to xml_curl
  '''
  import logging
  
  import pytest
  from lxml import etree
  from mock import Mock
  
  from wirecurly.directory import Domain, User
     
  def test_domain_no_users():
      domain = Domain('wirephone.com.ar')
      response = domain.todict()
      assert domain.domain == 'wirephone.com.ar'
      assert len(response['children']) == 0
      assert not domain.users
  
  def test_domain_1_user():
      domain = Domain('wirephone.com.ar')
      user = Mock(User)
      domain.addUser(user)
      
      assert domain.users
      assert len(domain.users) == 1
      assert domain.users[0] == user
      response = domain.todict()
      assert len(response['children']) == 1
      assert response.get('children')[0] == user.todict()
  
  def test_domain_with_group():
      domain = Domain('wirephone.com.ar')
      user = Mock(User)
      domain.addUser(user)
      domain.addUsersToGroup()
      
      response = domain.todict()
      
      assert response.get('children')[0]['tag'] == 'groups'
      assert response.get('children')[0].get('children')[0]['tag'] == 'group'
      assert response.get('children')[0].get('children')[0].get('children')[0]['tag'] == 'users'
  
  def test_domain_with_group_name():
      domain = Domain('wirephone.com.ar')
      user = Mock(User)
      domain.addUser(user)
      domain.addUsersToGroup('group_name')
      
      response = domain.todict()
  
      assert response.get('children')[0].get('children')[0]['attrs']['name'] == 'group_name'
subject: Add tests for addUsersToGroup function