Durée de lecture : environ 7 minutesIntegration tests have always appeared as being slow and fragile. Slow because they imply launching APIs, network connections, database queries, etc… and fragile because any time a dependency is not available or data are modified then these tests might fail. Moreover, creating new data (e.g. with INSERTs in database) is Read more…
Durée de lecture : environ 5 minutesIn a previous article, I wrote about finding sequential calls that could be parallelized. Today, I wish to address another issue with an algorithmic angle : finding and optimizing code performance issues in C#. Story time Just like in the previous post, I was investigating performance stuff back in May Read more…
Durée de lecture : environ 6 minutesBack in April 2023 when I was working at a French hospitality group, some business indicators led us to believe that the performance of our APIs was degraded. As I went to investigate, I found several issues which I will cover in several articles.Today I will address a simple point Read more…
Durée de lecture : environ 7 minutesBefore C# 8 came in in 2019, the following code compiled just fine : However since C# 8, and if the <Nullable> option is set to enable in the csproj (which is the case by default since C# 10/.Net 6), a warning appears at build time and the variable will Read more…
Durée de lecture : environ 3 minutesRecords, or data classes, were introduced with C# 9. They have a specific and concise syntax along with some strong constraints. Despite being released in late 2020, I feel like they are not very popular : I still encounter DTOs and POCOs written with classes and public getters/setters. So why Read more…
Durée de lecture : environ 10 minutesDans la première partie, nous avons vu les concepts exposés dans le livre Accelerate et les mesures mises en place pour calculer la performance d’une organisation. Nous allons dans cet article nous intéresser aux actions concrètes pour améliorer ces performances. Bien évidemment, il ne suffit pas d’avoir une usine de Read more…
Durée de lecture : environ 7 minutesOn a souvent vu passer cette citation de Mark Zuckerberg “Move fast and break things”. Il est bon de rappeler que ce qui était autrefois la devise de Facebook est devenue “Move fast with stable infrastructure” en 2014…Mais concrètement, ça signifie quoi “aller vite” ? Peut-on et doit-on accélérer en Read more…
Durée de lecture : environ 10 minutesWe just saw in the previous article what builders, coupled with a fluent API, could bring to the table in terms of tests’ readability. However, we quickly realised that the more complex the production code was, the higher the complexity of the technical code became. In this article, we will Read more…
Durée de lecture : environ 10 minutesOn vient de voir dans l’article précédent ce que les builders associés à une API fluent pouvaient apporter à la lisibilité des tests. En revanche, on s’est aperçu rapidement que la complexité du code purement technique augmentait en fonction de la complexité du code à tester. Nous allons donc nous Read more…
Durée de lecture : environ 8 minutes(In order to not overload this already dense article, we assume you’re familiar with the notion of adapters in hexagonal architecture. We will also be using words like “mock” or “stub” interchangeably because the difference does not seem clear to anyone, as this interesting discussion on StackOverflow shows. Finally, on Read more…