chzmkl/testing-javascript

Some example exercises for learning how to test your JavaScript code.

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'.