Optional Task: Add first unit test

[farzaneh-haghani]

Concepts

• Jest https://jestjs.io/

Tasks

• Install jest to the node js package see https://jestjs.io/docs/getting-started
• Create a simple function that takes in some simple variables and returns a string

function greeting(name, loggedIn) {
  if (loggedIn === true) {
    return $`Hello, ${name}`
  }
  return "Hello Guest"

}

• Use this function (or something similar) in the react page
• Add a jest test