01-Basic Setup

• To run the tests -yarn test --

• Install a brand new project - yarn init -y - yarn add vitest -D

• To run the test case first write a script file in the package json.

{
  "name": "Vitest-01",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "test": "vitest"
  },
  "devDependencies": {
    "vitest": "^0.34.6"
  }
}

• To run the tests -yarn test

02-AAA Pattern

• Arrange the data
• Perform the action
• Evaluate the expectations