March 2025
Intermediate to advanced
202 pages
4h 45m
English
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Chapter 9Testing Event-Sourced Systems
Now that you’ve experienced the core building blocks of event-sourced applications from writing code to securing systems, it’s time to start thinking about how this works on teams, at scales, and in production.
For that, you’ll need to test. The ability to reliably and easily test an application is one of the core reasons why people embrace event sourcing as a pattern. Unfortunately, testing is one of the least documented and discussed aspects of event sourcing. This leaves us with a dichotomy: it should be easy, but we don’t know how to do it.
In this chapter, you’ll see that testing event-sourced applications should be as simple as writing tests for pure functions. You’ll also see that you can use this ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.