My contribution

It works now with pytest and typed with mypy. To run tests:

$ pytest .

Exercises roadmap as follows:

1. Finish CLI through TDD
2. Understand and debug mongobasket.aggregate.EventRegistry, it's exciting how that works 👁
3. Evolve from this design to a CQRS where commands are explicit

Bob's words

This repo contains the code smaples and slides for my "Eventsouring 101" talk.

The master branch contains a simple shopping basket, with tests, that stores state in a mongo database. The "from_scratch" branch has the code in a state ready for the live code exercise. The "eventsourced" branch is a less didactic, more fully fledged implementation.

To run the tests, just run make or make tests To start mongo, do make mongo and to view the slides, run make serve and then visit localhost:8000 in a browser.