Test against schemas generated from meta-schemas

[Zac-HD]

Helpfully, jsonschema includes a schema for each schema version, which can be loaded with e.g. jsonschema._utils.load_schema("draft7").

It would be a nice trick to mix some schema generated from these definitions in with the hand-crafted strategies and see what happens. Supporting references and definitions, for a start...

[Zac-HD]

I just read this guide to structuring schemata, which makes me think this won't be too bad. Specifically, we can keep the 'convert to strategy' part fairly simple by doing a pre-processing step up front that inlines all the definitions.

• Walk the full schema, accumulating a dict of json pointers to all refs, ids, and definitions in the document (probably separate dicts).
• Error on any remote resources; if it's not part of the document it's not supported here.
• Replace all ref-by-ids with ref-by-pointers. Replace all refs with the referenced definition. Any unknown refs are errors.

And then it's all known to be local, and we can hand it off to be recursively converted to a strategy.

Generating valid definitions and ensuring we reference them (but not undefined refs) will be pretty annoying, but probably doable as a post-processing step especially if we use ids.

[Zac-HD]

Closing this because I don't think it's helpful to add to the current schema strategies and corpora.