Changes for page Testable Design

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3	3	=== Core aspects ===
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5		-* **Object-Oriented**: While both procedural and functional programming paradigms can be tested, they often face a scalability problem. As the complexity of the system increases, testing isolated segments of code becomes increasingly difficult. One solution is to encapsulate this complex logic in an object-oriented hierarchy of classes. These classes can encapsulate the code and its associated complexity behind dependencies, creating isolated units that can be easily tested. The same procedural or functional code can easily be wrapped in classes, allowing to combine the benefits of all programming paradigms. It's worth noting that for any code base that reaches a certain level of complexity, adopting an object-oriented approach can significantly improve its testability.
	5	+* **Object-Oriented**: Although both procedural and functional programming paradigms support testing, managing test complexity can become a challenge as the system scales. As complexity increases, maintaining test isolation becomes more difficult. An effective strategy is to use object-oriented techniques that encapsulate complex logic within hierarchies of classes, creating testable units that hide their internal complexity behind interfaces. Wrapping procedural or functional code in classes can combine the strengths of several paradigms. Any code base that reaches a certain level of complexity can benefit from an object-oriented approach to improve testability.
6	6	* **Classes implement interfaces**: The class implements a well-designed interface, just as large as necessary to satisfy its requirements.
7	7	* **Tests run against interfaces**, so the implementations details are not relevant as long as the results are correct.
8	8	* **Minimal number of dependencies** in a unit for low complexity.