Generating Unit Tests & Code Documentation

Automating the Boring Parts of Software Engineering

Writing comprehensive unit tests and JSDoc/Docstring documentation is essential, but often tedious. AI is exceptionally good at both!

Generating Comprehensive Unit Tests

Ask the AI to cover edge cases, null checks, and boundary conditions:

Act as a QA Automation Engineer. Write a suite of unit tests for the `calculateDiscount(price, userLevel)` function using Jest.

Make sure to include test cases for:
1. Standard valid discount calculation.
2. Edge case: 0% discount and 100% discount.
3. Invalid inputs: negative price or invalid user level (should throw error).

Generating Clean JSDoc / Docstrings

"Generate JSDoc comments for this function including @param types, @returns type, a 1-line summary, and an example invocation."