How do I design for testability in Swift apps in Swift?

Designing for testability in Swift apps is crucial for maintaining clean, maintainable, and bug-free code. By applying principles such as dependency injection, proper use of protocols, and following the single responsibility principle, developers can ensure that their Swift applications are easy to test.
Swift, testability, dependency injection, protocols, unit testing, clean code, software design
// Example of a service protocol and a class that implements it in Swift protocol UserService { func fetchUser() -> User } class UserServiceImpl: UserService { func fetchUser() -> User { // Fetch user from a network or database } } class UserViewModel { private let userService: UserService init(userService: UserService) { self.userService = userService } func getUser() -> User { return userService.fetchUser() } }

Swift testability dependency injection protocols unit testing clean code software design

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