Swift Testing Essentials: A Practical Guide

Learn TDD, stubs, mocks, UI testing, and more to build robust, maintainable, and bug-free apps

What you'll learn

Test-Driven Development (TDD): Understand and apply TDD principles to write test-first code.

Unit Testing with Stubs and Mocks: Learn how to isolate dependencies and write unit tests using stubs and mocks.

UI Testing: Develop UI tests to verify user interactions and app flows.

View Logic Testing in SwiftUI: Test view models and SwiftUI views to ensure correct behavior.

Structuring and Maintaining Tests: Implement best practices for organizing and writing maintainable test cases.

Real-World Testing Workflows: Avoid common pitfalls and apply practical testing strategies to production-ready applications.

Requirements

Basic Swift Knowledge – Familiarity with Swift syntax, variables, functions, and object-oriented programming concepts.

Experience with Xcode – Ability to navigate Xcode, create and run iOS projects, and use the debugger.

Fundamental iOS Development Skills – Understanding of UIKit or SwiftUI and how iOS applications are structured.

Description

Testing is an essential part of building robust, maintainable, and high-quality iOS applications. Yet, many developers struggle with setting up a reliable testing strategy. Swift Testing Essentials: A Practical Guide is a hands-on course designed for developers of all experience levels who want to write effective tests with confidence.This course takes a practical approach to testing, covering everything from Test-Driven Development (TDD) to stubs, mocks, UI testing, and view logic testing. You'll learn when, what, and how to test different components of your app to ensure reliability and prevent regressions before they happen.What You'll Learn:- The fundamentals of Test-Driven Development (TDD) in iOS- How to use stubs and mocks for unit testing and dependency isolation- UI testing strategies to verify user interactions and flows- Techniques for testing view logic in SwiftUI- Best practices for structuring tests and writing maintainable test cases- Real-world testing workflows and common pitfalls to avoidHow This Course Will Benefit You:- Increase Code Confidence – Write tests that catch bugs early and prevent regressions- Improve App Stability – Ensure your app performs correctly across different scenarios- Boost Productivity – Catch issues faster, reduce debugging time, and ship with confidence- Write Maintainable Code – Learn test-friendly design patterns that make refactoring easier- Master Real-World Testing Techniques – Apply practical skills to production-ready applicationsWhether you're a beginner exploring iOS testing for the first time or an experienced developer looking to refine your testing strategy, this course will help you build high-quality, well-tested apps that stand the test of time.

Overview

Section 1: Introduction

Lecture 1 Introduction

Lecture 2 Exercise Files

Lecture 3 Getting Started

Section 2: Unit Tests

Lecture 4 Adding Testing Targets to your Project

Lecture 5 Tour of the Starter Project

Lecture 6 Deposit Amount for Check and Cash Deposit Type

Lecture 7 Structuring your Tests Using AAA Format

Lecture 8 Deposit Amount for Transfer Deposit Type & Calculating Fee

Lecture 9 Enable Sounds for Test Success & Failures

Lecture 10 Negative Amount Throws an Exception

Lecture 11 Withdrawing with Insufficient Funds Results in Penalty

Lecture 12 Depositing Amount is Added to the Transaction for Bank Account

Section 3: APRService Tests

Lecture 13 APR Service Returns APR within Expected Range

Lecture 14 Implementing CreditScoreProtocol and MockCreditScoreService

Lecture 15 Implementing APR Calculation Fails for SSN with no Credit Score

Section 4: Integration Testing

Lecture 16 APR Service Calls Get Credit Score on Credit Score Service

Lecture 17 APR Service Does Not Call Credit Score Service for Invalid SSN

Section 5: UI Testing

Lecture 18 User can Calculate APR Successfully with Valid SSN

Lecture 19 Implementing CreditScoreService Factory

Lecture 20 Displays Error Message When Credit Score Not Found for SSN

Section 6: Testing Credit Score Service

Lecture 21 Implementing Tests for Credit Score Service

Section 7: Testing View Logic

Lecture 22 Implementing Tests for View Logic

Lecture 23 Resource

Lecture 24 Bonus

iOS Developers (Beginner to Advanced) – If you develop iOS apps and want to ensure they are robust, maintainable, and bug-free, this course is for you.,Developers New to Testing – If you've never written tests before or struggle with testing concepts, this course will guide you step by step.,Experienced Developers Wanting to Improve Their Testing Strategy – If you already write tests but want to learn TDD, stubs, mocks, UI testing, and best practices, this course will refine your skills.,SwiftUI Developers – If you're working with SwiftUI and want to test view logic effectively, this course covers practical techniques.,Teams Adopting Test-Driven Development (TDD) – If your team is transitioning to TDD, this course provides the foundational knowledge to implement it successfully.