Validate if event-schema is valid json-schema

[dr0pi]

Expected Behavior

clin creates a valid json-schema from the yaml specs. In case the json-schema is not correct, fail fast and notify the user before (trying) to create/update an event-type in Nakadi.

This also allows for better error messages that hint the user to the actual error in the json-schema.

Actual Behavior

If the EventTypeSchema.schema is no valid json-schema, clin still posts to Nakadi and receives a 422 error.

Steps to Reproduce the Problem

1. define yaml schema for an event-type that requires another yaml (e.g. Location: "@@@./definitions/location.yaml")
2. remove the sub-schema linking
3. generate json with clin and post to Nakadi (clin apply -X -e production -t $(token) wrong.yaml )

Specifications

• Version: 1.0.0
• Platform: Mac OS 10.15.x
• Subsystem: Python 3.7.7