Book Image

Building Enterprise JavaScript Applications

By : Daniel Li
Book Image

Building Enterprise JavaScript Applications

By: Daniel Li

Overview of this book

With the over-abundance of tools in the JavaScript ecosystem, it's easy to feel lost. Build tools, package managers, loaders, bundlers, linters, compilers, transpilers, typecheckers - how do you make sense of it all? In this book, we will build a simple API and React application from scratch. We begin by setting up our development environment using Git, yarn, Babel, and ESLint. Then, we will use Express, Elasticsearch and JSON Web Tokens (JWTs) to build a stateless API service. For the front-end, we will use React, Redux, and Webpack. A central theme in the book is maintaining code quality. As such, we will enforce a Test-Driven Development (TDD) process using Selenium, Cucumber, Mocha, Sinon, and Istanbul. As we progress through the book, the focus will shift towards automation and infrastructure. You will learn to work with Continuous Integration (CI) servers like Jenkins, deploying services inside Docker containers, and run them on Kubernetes. By following this book, you would gain the skills needed to build robust, production-ready applications.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
The Importance of Good Code

Chapter 11. Continuous Integration

In the previous chapters, we adopted a Test-Driven Development (TDD) approach to developing a backend API server, which exposes a user directory platform. However, there are still many areas for improvement in our workflow:

  • We are running tests on our local, development environment, which may contain artifacts that lead to inaccurate test results
  • Carrying out all these steps manually is slow and error-prone

In this chapter, we are going to eliminate these two issues by integrating with a Continuous Integration server. In essence, a CI server is a service that watches for changes in your repository, and then automatically runs the test suite inside a clean environment. This ensures the test results are more deterministic and repeatable. In other words, it prevents situations where something works on one person's machine but not another's.

By following this chapter, you will:

  • Understand what CI is
  • Integrate our GitHub repository with a hosted CI platform called...