Andrew Bancroft • 9/4/2015

Testability Tip for Swift Developers – Parameterize and Push

This article presents a testability principle for Swift developers: 'If it’s controllable, it’s testable.' It explains how controlling inputs through parameterization—via initializers, property setters, or function parameters—enables predictable, testable outputs. The author draws an analogy to scientific experiments, emphasizing that holding variables constant allows accurate verification. Practical advice is given for setting up instance definitions with public initializers to support both production and test scenarios. The content is focused on software testing best practices in Swift development.

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#unit testing #Swift #Ios Development