[Proposal] Add wrapper checker

[pseudo-rnd-thoughts]

In v24 / 25, we added an environment checker for users to check that environment follow the API correctly.
As some environments implement their own wrappers and to check our own, it would be helpful to add a wrapper checker.

Proposed checks

• Check that all observations and actions spaces are valid (all observations are contained in space)
• Check the input and output types for reset and step

[Kallinteris-Andreas]

is this passiveEnvChecker?
close?

[pseudo-rnd-thoughts]

No, the passive environment checker is for the environment. I was more imagining a function similar to 'check_env' but for a wrapper

[noahfarr]

Is this still an open issue? If so, I'd like to give it a shot.

[pseudo-rnd-thoughts]

@noahfarr Hey, yeah, I don't think that anyone has worked on this so go for it

[CloseChoice]

Hi,
I don't quite understand the task here. So do want to check the class of a wrapper or an instance of it? If we want to check the class, I assume that we don't really have enough information to check that all observations and spaces are valid. If we check an instance, so

env = make_env('some_env')
wrapped_env = Wrapper(env)

Then why not just apply check_env onto wrapped_env? What am I missing here?

[pseudo-rnd-thoughts]

This would be for checking an instance of a wrapper with an environment to check that it is correctly implemented