Classes with a lot of lines of code are generally bad. Too many responsibilities, low cohesion, or both. However, sometimes it is not possible to make functions smaller. Reasons could be various. What can be done in this circumstance?

This article describes a TDD (Test Driven Development) approach to implement a Finite State Machine (FSM) using PHP+Laravel. However, such method is general and could be used in the programming language of your choice.

PHP 8.1 introduced the new Fiber class (see the proposed RFC here https://wiki.php.net/rfc/fiber), which allows running coroutines inside your script, i.e. two functions executing simultaneously

In the previous article TDD IMPLEMENTATION OF FINITE STATE MACHINE (FSM) WITH LARAVEL I discussed a basic approach for implement a Finite State Machine (FSM) on a Laravel model. In this article I will further discuss the topic by applying a more engineered approach. It involves the usage of the State pattern