text: import unittest
  import datetime
  import uuid
  import sys
  import json
  
  import sys, os, os.path
  root_directory = os.path.join(os.path.dirname(os.path.realpath(__file__)), '..', '..', '..', '..')
  if root_directory not in sys.path:
      sys.path.append(root_directory)
  
  from applicationinsights.channel.contracts import *
  from .Utils import TestJsonEncoder
  
  class TestUser(unittest.TestCase):
      def test_construct(self):
          item = User()
          self.assertNotEqual(item, None)
      
      def test_account_acquisition_date_property_works_as_expected(self):
          expected = 'Test string'
          item = User()
          item.account_acquisition_date = expected
          actual = item.account_acquisition_date
          self.assertEqual(expected, actual)
          expected = 'Other string'
          item.account_acquisition_date = expected
          actual = item.account_acquisition_date
          self.assertEqual(expected, actual)
      
      def test_account_id_property_works_as_expected(self):
          expected = 'Test string'
          item = User()
          item.account_id = expected
          actual = item.account_id
          self.assertEqual(expected, actual)
          expected = 'Other string'
          item.account_id = expected
          actual = item.account_id
          self.assertEqual(expected, actual)
      
      def test_user_agent_property_works_as_expected(self):
          expected = 'Test string'
          item = User()
          item.user_agent = expected
          actual = item.user_agent
          self.assertEqual(expected, actual)
          expected = 'Other string'
          item.user_agent = expected
          actual = item.user_agent
          self.assertEqual(expected, actual)
      
      def test_id_property_works_as_expected(self):
          expected = 'Test string'
          item = User()
          item.id = expected
          actual = item.id
          self.assertEqual(expected, actual)
          expected = 'Other string'
          item.id = expected
          actual = item.id
          self.assertEqual(expected, actual)
      
      def test_serialize_works_as_expected(self):
          item = User()
          item.account_acquisition_date = 'Test string'
          item.account_id = 'Test string'
          item.user_agent = 'Test string'
          item.id = 'Test string'
          actual = json.dumps(item.write(), separators=(',', ':'), cls=TestJsonEncoder)
          expected = '{"ai.user.accountAcquisitionDate":"Test string","ai.user.accountId":"Test string","ai.user.userAgent":"Test string","ai.user.id":"Test string"}'
          self.assertEqual(expected, actual)
  
  