text: from unittest.mock import MagicMock
  
  import pytest
  from django.core.cache import cache
  from django.core.cache.backends.db import BaseDatabaseCache
  from django.core.cache.backends.memcached import BaseMemcachedCache
  
  from internal import lock
  
  
  class TestGetLockCls:
      def test_redis(self, mocker):
          """Test to get the Redis lock"""
  
          class BaseRedisBackend:
              pass
  
          class RedisBackend(BaseRedisBackend):
              pass
  
          mocker.patch("internal.lock.redis_backends", (BaseRedisBackend,))
          mocked_backend_cls = mocker.patch("internal.lock._backend_cls")
          mocked_backend_cls.return_value = RedisBackend
  
          assert lock.get_lock_cls(MagicMock()) is lock.RedisLock
  
      def test_memcached(self, mocker):
          """Test to get the Memcached lock"""
  
          class MemcachedCache(BaseMemcachedCache):
              pass
  
          mocked_backend_cls = mocker.patch("internal.lock._backend_cls")
          mocked_backend_cls.return_value = MemcachedCache
  
          assert lock.get_lock_cls(MagicMock()) is lock.MemcachedLock
  
      def test_database(self, mocker):
          """Test to get the Database lock"""
  
          class DatabaseCache(BaseDatabaseCache):
              pass
  
          mocked_backend_cls = mocker.patch("internal.lock._backend_cls")
          mocked_backend_cls.return_value = DatabaseCache
  
          with pytest.raises(NotImplementedError):
              lock.get_lock_cls(MagicMock())
  
      def test_(self, mocker):
          """Test to get the normal lock"""
  
          class OtherCache:
              pass
  
          mocked_backend_cls = mocker.patch("internal.lock._backend_cls")
          mocked_backend_cls.return_value = OtherCache
  
          assert lock.get_lock_cls(MagicMock()) is lock.Lock
  
  
  class TestLock:
      def test_get(self, mocker):
          """Test to get a lock without arguments"""
          mocked_get_lock_cls = mocker.patch("internal.lock.get_lock_cls")
  
          lock.lock("name")
  
          mocked_get_lock_cls.assert_called_with(cache)
          mocked_get_lock_cls.return_value.assert_called_with("name", cache)
  
      def test_get_client(self, mocker):
          """Test to get a lock with a specific client"""
          client = MagicMock()
          mocked_get_lock_cls = mocker.patch("internal.lock.get_lock_cls")
  
          lock.lock("name", client)
  
          mocked_get_lock_cls.assert_called_with(client)
          mocked_get_lock_cls.return_value.assert_called_with("name", client)
  