Andrew Bancroft • 9/4/2015

Testability Tip for Swift Developers – Parameterize and Push

This article presents a testability principle for Swift developers called 'Parameterize and Push', building on the idea that controllable code is testable. It explains how controlling inputs (via initializers, property setters, or function parameters) ensures predictable outputs, drawing an analogy to scientific experiments. The article covers three forms of parameterization and their usefulness in unit testing, helping developers write more testable Swift code by decoupling data provision from logic.

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#testing #unit testing #Swift