Go to https://squarespace.com/seanallen to save 10% off your first purchase of a website or domain using code SEANALLEN. Unit Testing in Swift is a fundamental skill that will save you from errors and regressions. In this video I tell you what Unit Tests are and discuss the benefits of writing them. Then I show you a real example in code using a Tip Calculator app and then we discuss if writing Unit Tests is worth it for your project. My iOS Dev Courses: https://seanallen.teachable.com/ Twitter: Sean Allen - https://twitter.com/seanallen_dev Hired.com: https://hired.com/x/1n01g Book and learning recommendations that help out the channel if you decide to purchase (Affiliate Links): Paul Hudson's Hacking With Swift: https://gumroad.com/a/762098803 Donny Wals - Combine: https://gumroad.com/a/909014131 Mark Moeyken’s SwiftUI Books: www.bigmountainstudio.com/swiftui-views-book/fzc51 Objc.io Books (Thinking in SwiftUI & Advanced Swift): https://gumroad.com/a/656585843 Timestamps: 0:00 - What are Unit Tests? 1:40 - Benefits of Unit Tests 3:15 - Unit Test code example begins 4:55 - Add Test Target to project & files 6:55 - First Unit Test (Happy Path) 11:04 - Unit Test for negative number 15:12 - Tests aren't always worth it - here's why #swift #softwaredeveloper #iosdeveloper