Introduction to Unit Testing in JavaScript

Installation

First, clone this repository. Once, you have it on your computer, navigate to the directory in the terminal and run the following command:

npm install

Starting Up

Run the following from your terminal:

npm start

Getting Started

We'll be modifying two files as we complete these exercises:

• implentation.js
• test.js

Just to verify that everything works, there should be a first example in place.

// implementation.js
function square(n) {
  return n * n;
}

// test.js
describe('square', function () {

  it('returns the square of a number', function () {
    assert.equal(square(2), 4);
  });

});

Together

Let's write a few simple cases together. We'll revisit our old friends from last week.

• addTwo()
• multiply()
• subtract()
• multiply()
• divide()

Your Turn: FizzBuzz

FizzBuzz is a classic programming program that a lot of programmers apparently can't do.

We're going to write a function called fizzBuzz() that will behave as follows with the each rule taking precendence over all previous rules:

• If we pass it a number, it will return that number.
• If we pass a number that is a multiple of 3, it will return 'Fizz'.
• If we pass it a number that is a multiple of 5, it will return 'Buzz'.
• If we pass it a number that is a multiple of both 3 and 5, it will return 'FizzBuzz'.