Learn How to Test iOS Applications!The book that teaches you to write maintainable and sustainable apps by building them with testing in mind or adding tests to already-written apps. This book will teach you all about test-driven development (TDD) — the art of turning requirements into tests and tests into production code. You'll get hands-on TDD experience by creating three real-world apps in this book. This book is for intermediate iOS developers who already know the basics of iOS and Swift development but want to learn how to write code which is both testable and maintainable. To start, you'll learn the TDD Cycle and how to implement these concepts within an iOS application. The book then takes you through Test Expressions and Expectation so that you can test synchronous code.