Document the Testing Package

[Tyler-Keith-Thompson]

Is your feature request related to a problem? Please describe.

There's a really great new testing package but no information about it.

Describe the solution you'd like

I want documentation available that tells me how to install and use the new testing package

Describe alternatives you've considered

We could have people randomly start typing code and praying it will work, but that seems like a poor alternative.

Additional context

• It's worth discussing whether Jazzy should show any of this
• It's worth discussing just how much you document about testing functions
• Do the getting started guides go into much detail about it?
• Testing is one of the things that sets us apart as a mature library you can trust, so there's something to capitalize on here

[nickkaczmarek]

I don't know for sure, but is this related to this issue. I asked because you mentioned wanting to know how to install our testing package. I imagine SPM is an option and probably CocoaPods, but I think we're blocked on the XCFramework style of things.