new_contents: from yunity.utils.tests.abc import BaseTestCase
  from yunity.utils.tests.fake import faker as default_faker, Faker
  from yunity.utils.validation import Validator, OfType, HasKey, IsReasonableLengthString
  
  
  class ValidLocation(Validator):
      def __call__(self, location):
          (HasKey('description') & IsReasonableLengthString())(location)
          (HasKey('latitude') & OfType(float))(location)
          (HasKey('longitude') & OfType(float))(location)
  
  
  class FakerTestCase(BaseTestCase):
      def test_faker_creates_fake_locations(self):
          self.given_data()
          self.when_calling(default_faker.location)
          self.then_invocation_passed_with(ValidLocation())
  
      def test_faker_is_deterministic(self):
          self.given_new_faker()
          self.when_creating_fake_data()
          self.given_new_faker()
          self.when_creating_fake_data()
          self.then_fake_data_matches()
  
      def setUp(self):
          super().setUp()
          self.faker = None
          self.fake_data = []
  
      def given_new_faker(self):
          del self.faker
          self.faker = Faker()
  
      def when_creating_fake_data(self, with_method='name', num_data=10):
          fake_data = [getattr(self.faker, with_method)() for _ in range(num_data)]
          self.fake_data.append(fake_data)
  
      def then_fake_data_matches(self):
          for fake_data in self.fake_data:
              self.assertEqual(fake_data, self.fake_data[0])
  
subject: Add test for fake data generation