Feature request: Loki alert rule tests

[dannystaple]

Is your feature request related to a problem? Please describe.
When making prometheus alert or recording rules, there's a system to test them. Making Loki alert or recording rules is frustrating since there's no clear testing system.

Describe the solution you'd like
I'd like a system for Loki that mirrors the prometheus system described at https://prometheus.io/docs/prometheus/latest/configuration/unit_testing_rules/.

Describe alternatives you've considered
Keeping things in prometheus as much as possible, so promtool test can be used. Making Loki recording rules only if possible.

Additional context
This could potentially be a loki tool, or some kind of cortextool extension?

[kavirajk]

I love idea. Loki already have a CLI tool (logcli). Would love to see something like this integrated into LogCLI. May be LogCLI is the best place for it?

[fraserdarwent]

+1 would be great to have

[superg28-dm]

+1 was just searching if this was possible

[jsolana]

+1 , any news related?