2-2 When Have I Written Enough Tests?

After this lecture, you will be able to:

• Explain how TypeScript types and documented preconditions influence what tests you need to write
• Explain the difference between the any and unknown types in TypeScript
• Understand the structure of a simple Express server incorporating Zod validation
• Explain what code coverage is, and how different measures differ, including statements, branches, functions, and lines

• Individual Project 1 Due Monday, August 21 by 11:59pm (CST)

• 2-2 When have I written enough tests?

• Activity 2-2: Messing With APIs

• Installing a Development Environment
• TypeScript Basics
• Unit Testing with Vitest
• Guide to API Requests and Installing Postman

• Working with JSON
• Zod documentation
• Software Engineering at Google: "Testing"
• Go Testing By Example, by Rob Pike — source of the "Coverage is no substitute for thought" quote from the slides with a lot of good and general advice about testing