Gio Lodi spent the past decade writing tests. He began with full-stack web development before moving into iOS programming and, more recently, into mobile infrastructure engineering. Ruby on Rails introduced him to the TDD world, and he fell in love with the fast-paced feedback loop. Any big problem could be decomposed in smaller and smaller parts until it got to an achievable size. Due to the lack of tools he first encountered moving into the Apple ecosystem, Gio researched and experimented with testing strategies and tools document in an ongoing project that catalogued on his blog and in talks and workshops at various industry conferences.

Test any kind of software, simple or complicated, pure logic or interfacing, with third-party dependencies

Gain helpful guidance from compiler errors as from failing tests

Solve problems incrementally by writing only as much code as necessary

Chapter 1: Why TDD?.- Chapter 2: XCTest Introduction.- Chapter 3: Getting Started with TDD.- Chapter 4: TDD in the Real World.- Chapter 5: Changing Tests with Fixtures.- Chapter 6: Testing Static SwiftUI Views.- Chapter 7: Testing Dynamic SwiftUI Views .- Chapter 8: Code Based on Indirect Inputs.- Chapter 9: Testing JSON Decoding.- Chapter 10: Testing Network Code.- Chapter 11: Injecting Dependencies with [...] Chapter 12: Testing Side Effects.- Chapter 13: Testing a Conditional View Presentation.- Chapter 14 Fixing Bugs and Changing Existing Code with TDD.- Chapter 15 Keeping Tests Isolated with Fakes and Clear with Dummies.- Chapter 16: Conclusion.- Cheat Sheet.- Appendix A: Where to Go From Here.- Appendix B: Testing with Quick and Nimble.- Appendix C: TDD with UIKit.