Hexagonal architecture has become in a very popular layered architecture in the last years. I would like to explore the principles under this architecture and how to understand it. The hexagonal architecture, or ports and adapters architecture, is an architectural pattern used in software design. It aims at creating loosely…

A lot of developers are not able to distinguish between a good and a bad design and which are the problems of their code. Is your code The good, the Bad or the Ugly? I have been in a lot of conversations with other developers where they don’t have tools…

It seems to me that we need a test strategy when we have a QA department. When we move all testing responsibilities to a team, we usually create a kind of regulated process to test. There is no difference between tests and coding, tests as code are the outputs of…

Tests are essential for maintaining quality during the years. But there is no value on testing the same thing twice. Ideally, just one test should fail when you introduce a bug in your code. Tests are a second program we create to check the first main thing that we want…

I consider tests as documentation, they are living examples of what one piece of software does. But good documentation needs to talk about relevant details and avoid irrelevant details to avoid overwhelming the reader. Tests, apart from other characteristics, are a great documentation of our code. They are live examples…

Nowadays in the industry the number of libraries, frameworks, external API's we used to develop our solutions is so high that we basically depend on things we cannot control. If we are the creators of anything public, we should respect our clients, backward compatibility should be always a requirement. Open…

Thinking on different experiences in different companies, I have been starting thinking that software is like Mario’s levels. Each level has its own challenges, but help you to unlock the power of the next one. I think there is a kind of relationship between the practices and techniques you know…

A flaky test is a test that both passes and fails periodically without any code changes. It’s interesting to discuss the reasons behind writing tests. We write tests to be sure that our code is doing what we are expecting, but why not doing this manually?. The answer to that question…

One of the more important characteristics about software vs hardware is the idea that is easy to change. Why do we forget this? In computer science, a universal Turing machine (UTM) is a Turing machine that simulates an arbitrary Turing machine on arbitrary input. The universal machine essentially achieves this…