u/IndividualSituation8

Hey all, looking for advice on learning to structure codebase to be testable, typical nuances on interface design, dependency injection, async testing, fuzzing, property based testing, other details like approaches to complex mocking, fixtures, separating side effects and creating effect systems/DSL , designing code in FCIS style, and a lot more about designing for testability?

Willing to pay up for a really good book or course.