Mocha

• Discourage arrow function

Why Mocha

• No configuration required
• Smart align to nodejs (esm)

Why not mocha

• ts-mocha is not recognized by Webstorm
• No simple way to configure for mocha test framework for Typescript
• https://github.com/davidkhala/ts-template/issues/1

JEST

• default test folder: __tests__. see in https://jestjs.io/docs/configuration#testregex-string--arraystring

Why Jest

• It takes care both nodejs and typescript
• It is widely used in Meta

Why not Jest

• ECMAScript Modules is disabled by default
  • under Preview (06-Apr-2023)

ViTest

• https://github.com/vitest-dev/vitest

supertest

HTTP assertions

• powered by superagent.

Notes

• Replace assert.equal with assert.strictEqual