TypeScript Testing & Architecture

What this module covers

5 steps · TypeScript

1. Step 1. Lesson: TypeScript Testing & Architecture

   Test typed functions, design dependency boundaries, use fakes, and keep domain logic independent from frameworks. Learning objectives - Recognize when typescript testing & architecture is the right tool. - Explain the role of test, expect, interface. - Build a small working example before combining it with a larger interface. - Identify one accessibility, maintainability, or error-handling improvement. Read the example, predict what it will do, then complete the small change described in the check question.

   Test typed functions, design dependency boundaries, use fakes, and keep domain logic independent from frameworks. In TypeScript, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [TypeScript] Use the example to demonstrate typescript testing & architecture.

2. Step 2. Quiz: TypeScript Testing & Architecture

   Check your understanding of TypeScript Testing & Architecture.

   A fake clock gives tests full control over time. In TypeScript, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [TypeScript] Complete the knowledge check.

3. Step 3. Exercise: TypeScript Testing & Architecture

   Refactor time-dependent logic behind an interface and test it with a deterministic fake.

   This exercise turns the TypeScript Testing & Architecture lesson into a working code change. In TypeScript, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [TypeScript] Does the solution use test and expect and interface?

4. Step 4. Review lab: Explain & improve TypeScript Testing & Architecture

   Rebuild the exercise without copying the solution. Then improve it in two ways: make the code easier to understand and add one useful edge case, responsive behavior, accessibility improvement, or error state. Finally, write a short explanation of how test, expect, interface work together.

   Rebuilding from memory and improving an edge case turns recognition into durable skill. In TypeScript, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [TypeScript] Does the improved version still use test, expect, interface clearly?

5. Step 5. Mini project: TypeScript Testing & Architecture

   Create a layered typed application with domain models, ports, adapters, tests, and explicit error contracts.

   The mini project combines the module lesson, quiz, and exercise into one portfolio-ready result. In TypeScript, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [TypeScript] Does the project apply the module's typescript testing & architecture skills?