old_contents: import pytest
  
  from faker import Faker
  from faker.providers import DynamicProvider
  
  
  class TestDynamicProvider:
      def test_without_dynamic(self):
          faker = Faker()
          with pytest.raises(
              AttributeError,
              match="'Generator' object has no attribute 'medical_profession'",
          ):
              faker.medical_profession()
  
      def test_with_dynamic(self):
          faker = Faker()
          elements = ["dr.", "doctor", "nurse", "surgeon", "clerk"]
          provider_name = "medical_profession"
  
          medical_professions_provider = DynamicProvider(
              provider_name=provider_name,
              elements=elements,
          )
  
          faker.add_provider(medical_professions_provider)
  
          assert faker.medical_profession() in elements
  
      def test_dynamic_with_special_provider_name(self):
          elements = ["dr.", "doctor", "nurse", "surgeon", "clerk"]
          provider_name = "__special__"  # The provider name cannot start with __
  
          with pytest.raises(
              ValueError,
              match="Provider name cannot start with __ as it would be ignored by Faker",
          ):
              DynamicProvider(
                  provider_name=provider_name,
                  elements=elements,
              )
  
      def test_dynamic_with_empty_elements(self):
          elements = []
          provider_name = "my_provider"
          provider = DynamicProvider(
                  provider_name=provider_name,
                  elements=elements,
              )
          faker = Faker()
          faker.add_provider(provider)
  
          with pytest.raises(
              ValueError,
              match="Elements should be a list of values the provider samples from",
          ):
              faker.my_provider()
  
      def test_dynamic_add_element(self):
          elements = []
          provider_name = "my_provider"
          provider = DynamicProvider(
                  provider_name=provider_name,
                  elements=elements,
              )
          faker = Faker()
          faker.add_provider(provider)
  
          provider.add_element("one")
          provider.add_element("two")
  
          assert faker.my_provider() in ("one", "two")
  
new_contents: import pytest
  
  from faker import Faker
  from faker.providers import DynamicProvider
  
  
  class TestDynamicProvider:
      def test_without_dynamic(self):
          faker = Faker()
          with pytest.raises(
              AttributeError,
              match="'Generator' object has no attribute 'medical_profession'",
          ):
              faker.medical_profession()
  
      def test_with_dynamic(self):
          faker = Faker()
          elements = ["dr.", "doctor", "nurse", "surgeon", "clerk"]
          provider_name = "medical_profession"
  
          medical_professions_provider = DynamicProvider(
              provider_name=provider_name,
              elements=elements,
          )
  
          faker.add_provider(medical_professions_provider)
  
          assert faker.medical_profession() in elements
  
      def test_dynamic_with_special_provider_name(self):
          elements = ["dr.", "doctor", "nurse", "surgeon", "clerk"]
          provider_name = "__special__"  # The provider name cannot start with __
  
          with pytest.raises(
              ValueError,
              match="Provider name cannot start with __ as it would be ignored by Faker",
          ):
              DynamicProvider(
                  provider_name=provider_name,
                  elements=elements,
              )
  
      def test_dynamic_with_empty_elements(self):
          elements = []
          provider_name = "my_provider"
          provider = DynamicProvider(
              provider_name=provider_name,
              elements=elements,
          )
          faker = Faker()
          faker.add_provider(provider)
  
          with pytest.raises(
              ValueError,
              match="Elements should be a list of values the provider samples from",
          ):
              faker.my_provider()
  
      def test_dynamic_add_element(self):
          elements = []
          provider_name = "my_provider"
          provider = DynamicProvider(
              provider_name=provider_name,
              elements=elements,
          )
          faker = Faker()
          faker.add_provider(provider)
  
          provider.add_element("one")
          provider.add_element("two")
  
          assert faker.my_provider() in ("one", "two")
  
subject: fix indentation