JavaScript Unit Testing

Overview

• This is a simple project to showcase Unit Tests in JavaScript using Mocha/Chai and Stubs
• Skills: Unit Testing using Stub
• Languages: JavaScript
• SCM: Git
• Build/Dependency Management: Mocha/npm/sinon
• Assertion Lib: Chai, Expect, Should
• CI/CD: CircleCI

Setup

• Download javascript-unit-tests-mocha project repo from GitHub
• Install latest Node.JS
• Install Git
• Install Visual Studio Code
• Navigate to Project Directory in Terminal
• Run npm install
• Run App npm start (dry run)
• Run Unit Tests npm test

Unit Tests

Unit Test for UserController Class
When ISOLATED (Stubbed)
  ✓ Verify Keys of 'getAll' JSON Output - Stubbed
  ✓ Verify 'Users' is an Array in 'getAll' JSON Output - Stubbed
  ✓ Verify 'id' is NUMBER in 'getAll' JSON Output - Stubbed
  ✓ Verify 'username' is STRING in 'getAll' JSON Output - Stubbed
  ✓ Verify 'email' is STRING in 'getAll' JSON Output - Stubbed 

Unit Test for UserService Class
When ISOLATED (Stubbed)
  ✓ Verify Keys of 'getAll' JSON Output - Stubbed
  ✓ Verify 'Users' is an Array in 'getAll' JSON Output - Stubbed
  ✓ Verify 'id' is NUMBER in 'getAll' JSON Output - Stubbed
  ✓ Verify 'username' is STRING in 'getAll' JSON Output - Stubbed
  ✓ Verify 'email' is STRING in 'getAll' JSON Output - Stubbed

Continuous Integration

• CircleCI - Config.yml

    version: 2
    jobs:
        build:
            working_directory: ~/javascript-unit-tests-mocha
        docker:
            - image: circleci/node:8.0
            - image: mongo:3.4.4
        steps:
            - run:
                name: "Checking NodeJs + NPM Version"
                command: |
                node --version
                npm --version
            - checkout
            - restore_cache:
                key: dependency-cache-{{ checksum "package.json" }}
            - run:
                name: Install NPM Packages
                command: 'sudo npm install'
            - run:
                name: NPM Start
                command: 'npm start'
            - run:
                name: Run Unit Tests
                command: 'npm test'