This is my attempt at the Gilded Rose Refactoring kata (by Emily Bache) in TypeScript.

Install dependencies

npm install

Uses vitest for unit tests.

npm run test

To run all tests in watch mode

npm run test:watch

You may need to install ts-node

npx ts-node test/golden-master-text-test.ts

Or with number of days as args:

npx ts-node test/golden-master-text-test.ts 10

• Initital repo setup
• Added test cases as per requirements of the kata, that already pass because the function works expected
• Refactors begin:
  • More idiomatic type definitions
  • This line (57 during this commit) basically means 0
  • Reduced nesting by one level by using the exceptionalItems array to check if the item is exception case
  • Reduced nesting by one level by using the Math.min function to ensure the quality is not greater than 50
  • Using a for...of loop for cleaner, more readable code
  • Converted the logic to a switch case for better readability
• Added failing test case for Conjured items