Atomically decrease all TTLs

[rightaway]

I'd like to do integration (or even end to end) testing in an application that uses redis. But to do that I need to test certain keys before and after their TTL goes to 0, but of course I can't have a test wait an hour for a particular key with a one hour TTL to expire.

It would help to have a command in redis to simulate skipping the time ahead, something like TIME -3600 to atomically decrease all TTLs by an hour. I'm currently using unit testing but this feature would allow me to do integration testing to really ensure application robustness.

[RajatPawar]

Could we introduce a client flag (for TTL_SIMULATE) & a field (how much to scale down the TTL) which we could then check in SetGenericCommand?

(Apologies in advance for mistakes, I am very newly joining the contribution community)

[jaamison]

This seems kind of bloat/creep-ish to add to redis core. I realize this may not be a feasible option for you, but just a random thought: Maybe you can parameterize your TTL values in your application so you can specify arbitrary lower values for your unit tests?

[itamarhaber]

It would help to have a command in redis to simulate skipping the time ahead

Or, you could set the server's clock via the OS to a time in the future instead.

[rightaway]

@itamarhaber That would break a lot of other expected and unexpected things. It's not a good idea to just change a server's time.