From Dependency Injection to Dependency Rejection

Explore a paradigm shift in software design through this conference talk that challenges the conventional wisdom of dependency injection in object-oriented programming. Delve into the complexities of decoupling in OOP and discover how functional programming offers a more elegant solution. Learn why dependency injection becomes unnecessary in functional design, and understand how this approach can simplify unit testing by eliminating the need for mocks and stubs. Gain insights into rejecting dependencies altogether, with examples provided in C# for object-oriented concepts and just-in-time explanations of relevant Haskell or F# syntax for functional programming illustrations. No prior knowledge of functional languages is required to benefit from this hour-long presentation that promises to reshape your understanding of software architecture and testing practices.

From Dependency injection to dependency rejection - Mark Seemann