explane420 / stt-pz-4.1

Practical lesson stt-pz-4

In this lesson is next step to understand BDD testing in javascript. Using Jest Jest is a delightful JavaScript Testing Framework with a focus on simplicity

What need to do:

• Setting up the testing environment
• Implement unit tests for Calculator.ts according to Behavior Development Driven (BDD) concepts
• Implement tests for libs/Calculator.spec.js

Acceptance criteria

• Understand basic concepts of Test Development (BDD)
• Understand difference between TDD vs BDD
• Understand how to use Jest spyOn
• Setting up the testing environment
• Build and run them
• Code coverage must be mote than 90%

Getting started

Install npm packages

npm install

Start App

npm run dev

Run tests

npm run test

Useful links

• Пирамида тестирования.
• Що таке TDD і BDD.
• How to Mock Using Jest.spyOn.