TTL returns -2 (not found) for empty streams

[Eugeny]

STR:

fake_redis.xadd(self.stream_name, {'x': 1})
fake_redis.expire(self.stream_name, 60 * 60 * 24 * 365 * 99)
assert fake_redis.keys(self.stream_name) 
fake_redis.ttl(self.stream_name) # is -2

Python 3.10 redis-py==4.5.4 fakeredis==2.23.2

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[Eugeny]

Upon further investigation this is due to if (not key...) return in _expireat, whose __bool__ then checks for bool(self._value) which is False because XStream.__len__ is 0

[cunla]

Thanks for reporting this. Do you want to work on a fix and submit a PR (since you already did the hard part)?

Otherwise, I will work on it this weekend;

[Eugeny]

I'm not actually sure what the purpose of the if not key check in _expireat is so I would prefer not to risk breaking anything by not knowing the library, I literally just started using it today :D

[cunla]

No prob, I'll have a look at it later this week. Thanks again for reporting

[cunla]

fixed

[Eugeny]

Thank you!