Cyrille Martraire

Cyrille Martraire

Deliberate Designer
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· Blink Modelling with Cyrille
· Property-based Testing with Monoids


Cyrille Martraire (@cyriux) is CTO and partner at Arolla (@ArollaFr), the founder of the Paris Software Craftsmanship community and a regular speaker at international conferences. With 20 years of experience in startups, software vendors and banks, Cyrille still calls himself a developer. He's passionate about design in every aspect: TDD, BDD and in particular DDD.

Cyrille also has an extensive knowledge of capital market finance, and he's the author of the book Living Documentation published by Addison-Wesley Professional in summer 2019.

DDD Europe is pairing up master modellers with domain experts they’ve never met and domains they’ve never modelled.

In two hours, with the help of the entire brainpower of the participants, they’ll try to build a model at maximum speed. The masters will interview the experts, and use their choice of techniques, heuristics, and visualisations.

Will they succeed to synthesize all the ideas? Can they find structure where there is none? Will they get to the bottom of the problem? Join them in the world's only domain modelling reality show!

Property-based Testing with Monoids (Lab)
by Cyrille Martraire, Mathieu Eveillard

You may already know Property-based Testing as a complementary approach to TDD. You may also have heard of Monoids: they are simple maths creatures really useful to model all sorts of real-life business situations. In fact, you're probably familiar with them without knowing it. If not, do not worry: we’ll cover them first before starting a kata expected to demonstrate how well they combine!

Join Cyrille & Mathieu for this 2-hour workshop where you will be guided towards coding your own domain model powered by monoids and guided by Property-based testing. You will be ready to apply monoids at work the next day and it will change your coding (and testing) style forever!

Expected Audience: this workshop is for developers in any programming language, Java and JavaScript being the sweet spot. You’ll code in your IDE or with the IDE of your coding partner if you’re willing to!

Key learning points:

- Discover or revisit your understanding of Property-based testing and monoids
- Start practicing Property-based testing on an ideal case thanks to the strong properties of monoids
- Acknowledge the limits of the approach, and the relationships with other design patterns

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