bernlewal / fhtw-bif4-swen2-eventlister-cs

Sample project in C# for SWEN2 course, shows SOLID architecture, MVVM-pattern and Unit-Tests with MVVM

EventListerInCSharp

Sample project in C# for SWEN2-course, shows

• SOLID architecture,
• MVVM-pattern and
• Unit-Tests with MVVM.

SOLID

see: https://dotnetcoretutorials.com/2019/10/17/solid-in-c-single-responsibility-principle/ and https://www.baeldung.com/solid-principles

SRP - Single Responsibility Principle

• A class should have only one reason to change.
  • change of the html should not require a change of other logic
  • change of the transfer protocol (http -> https) should not require ...
  • ...
• no clear border

see split between communication and content interpretation

OCP - Open/Closed Principle

• Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification.
  • Can I extend this code and add more functionality without modifying the original code in any way.

CommandLineArgumentHandler loads filters based on command line parameters. see DefaultArgumentHandler

LSP - Liskov Substitution Principle

• Types can be replaced by their subtypes without altering the desirable properties of the program.
• if class A is a subtype of class B, then we should be able to replace B with A without disrupting the behavior of our program.

see: ArgumentHandler

Interface Segregation Principle

• No client should be forced to depend on methods it does not use
  • keep interfaces small

Dependency Inversion Principle

• High-level modules should not depend on low-level modules. Both should depend on abstractions (e.g. interfaces).
• Abstractions should not depend on details. Details (concrete implementations) should depend on abstractions.

Dependency Injection is a way to achieve Dependency Inversion