test mode

[jasonkuhrt]

When testing sometimes there is need to snapshot messages that might have colour in them. Colour is a concern for DX and has a valid reason to be captured in the snapshots. E.g. avoid colour regressions after refactoring.

It seems that colours codes differ across Node 12/14. graphql-nexus/nexus-prisma#3 (comment).

Anyways, it would be nice to have a test mode where instead of escape codes a nice human-readable string were emitted, like __RED__ or RED or KLEUR.RED.

This would generally be much richer to read in snapshots.