old_contents: from django.test import TestCase
  from users.models import User
  
  from django.core.exceptions import ValidationError
  
  class UserPasswordTest(TestCase):
      def setUp(self):
          self.user = User()
          self.valid_email = "test@example.com"
          self.valid_password = "123456"
          self.invalid_password = "12345"
  
      def test_user_should_have_password_field(self):
          try:
              self.user.password
          except AttributeError:
              self.fail("User should have password field")
  
      def test_user_password_is_at_least_6_digit(self):
          self.user.password = self.valid_password
          self.assertGreaterEqual(len(self.user.password),6,"phone number is less than 6")
  
      def test_user_with_short_password_should_not_be_valid(self):
          self.assertRaises(ValidationError, User.objects.create_user,
                  email = self.valid_email,
                  password = self.invalid_password )
  
      def test_user_password_should_be_encrypted(self):
          user = User.objects.create_user( email = self.valid_email, password = self.valid_password )
          self.assertNotEqual(self.valid_password, user.password)
  
new_contents: from django.test import TestCase
  from users.models import User
  
  from django.core.exceptions import ValidationError
  
  class UserPasswordTest(TestCase):
      def setUp(self):
          self.user = User()
          self.valid_email = "test@example.com"
          self.valid_password = "123456"
          self.too_short_password = "a" * 5
          self.too_long_password = "a" * 256
  
      def test_user_should_have_password(self):
          self.assertIsNotNone(self.user.password)
  
      def test_user_password_validate(self):
          self.user.password = self.valid_password
          self.assertGreaterEqual(
              len(self.user.password),
              6,
              "phone number is less than 6",
          )
  
      def test_user_password_too_short(self):
          self.assertRaises(
              ValidationError, 
              User.objects.create_user,
              email = self.valid_email,
              password = self.too_short_password
          )
  
      def test_user_password_too_long(self):
          self.assertRaises(
              ValidationError, 
              User.objects.create_user,
              email = self.valid_email,
              password = self.too_long_password
          )
  
      def test_user_password_should_be_encrypted(self):
          user = User.objects.create_user(
              email = self.valid_email, 
              password = self.valid_password
          )
          self.assertNotEqual(self.valid_password, user.password)
  
subject: test password max characters test added and refactored