One item the architecture round scores is "can you add unit tests without a big refactor". Which design decisions satisfy that condition, with an example?
The key is a boundary that keeps business logic from knowing the frameworks (UIKit, SwiftUI, URLSession, Core Data) directly. Define dependencies as protocols and inject them through the initializer, express state transitions with pure functions and value types, and inject nondeterministic things like time, randomness, and UUID.
TestingShort answerBasics
This screen leans heavily on an API response. How would you change the code so you can…
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TestingShort answerBasics
The question asks about your experience writing code with unit tests in mind and the…
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ArchitectureShort answerBasics
Dependency Injection and the Dependency Inversion Principle have similar names. What's…
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ArchitectureMultiple choiceBasics
In a codebase where a singleton like AnalyticsManager.shared is referenced directly all…
#testability #dependency-injection