Further reading

To learn more about the topics that were covered in this chapter, take a look at the following resources:

• Hexagonal architecture, Alastair Cockburn: https://alistair.cockburn.us/hexagonal-architecture/

The original description of the hexagonal architecture in terms of ports and adapters.

• https://medium.com/pragmatic-programmers/unit-tests-are-first-fast-isolated-repeatable-self-verifying-and-timely-a83e8070698e

Credits the original inventors of the term FIRST, Tim Ottinger and Brett Schuchert.

• https://launchdarkly.com/blog/testing-in-production-for-safety-and-sanity/

Guide to testing code deployed on production systems, without accidentally triggering unintended consequences.