Fix TypeError in RedisCache.close() when called with signal parameter

[smaccona]

• Remove **kwargs from self.client.close() call in RedisCache.close()
• The DefaultClient.close() method doesn't accept parameters since commit c7be6cc
• This fixes TypeError when Django's request_finished signal calls cache.close(signal=...)
• Add test case to verify close() works with arbitrary keyword arguments

Fixes issue where django-redis 6.0+ would crash with: TypeError: close() got an unexpected keyword argument 'signal'

Closes #787.

[WisdomPill]

@smaccona Django 6 is not out yet, can you add it first and then fix the error?

[smaccona]

@WisdomPill I am not clear on what you are asking - I have not tested this in Django 6, only in Django 4.2 (originally) and now Django 5.2 as well. Here are the versions from my original bug report:

• Python version: 3.9+
• Django Redis Version: 6.0.0+
• Django Version: 4.2 (but I think this will apply to multiple versions)
• Redis Version: 7.0
• redis-py Version: 6.2.0
• gunicorn Version: 22.0.0 (but I think this will happen in other versions and other WSGI servers also)

The django-redis version tested was django-redis 6.0.0 (2025-06-17).

[rado-r]

Yes, I have same issue with django 5.2