Book Image

Vue.js 2 and Bootstrap 4 Web Development

By : Olga Filipova
Book Image

Vue.js 2 and Bootstrap 4 Web Development

By: Olga Filipova

Overview of this book

In this book, we will build a full stack web application right from scratch up to its deployment. We will start by building a small introduction application and then proceed to the creation of a fully functional, dynamic responsive web application called ProFitOro. In this application, we will build a Pomodoro timer combined with office workouts. Besides the Pomodoro timer and ProFitOro workouts will enable authentication and collaborative content management. We will explore topics such as Vue reactive data binding, reusable components, routing, and Vuex store along with its state, actions, mutations, and getters. We will create Vue applications using both webpack and Nuxt.js templates while exploring cool hot Nuxt.js features such as code splitting and server-side rendering. We will use Jest to test this application, and we will even revive some trigonometry from our secondary school! While developing the app, you will go through the new grid system of Bootstrap 4 along with Vue.js’ directives. We will connect Vuex store to the Firebase real-time database, data storage, and authentication APIs and use this data later inside the application’s reactive components. Finally, we will quickly deploy our application using the Firebase hosting mechanism.
Table of Contents (12 chapters)
11
Index

Snapshot testing with Jest


One of the coolest features of Jest is snapshot testing. What is snapshot testing? When our components are being rendered, they produce some HTML markup, right? It would be really important that once your application is stable, none of the newly added functionality breaks the already existing stable markup, don't you think? That's why snapshot testing exists. Once you generate a snapshot for some component, it will persist in the snapshot folder and on each test run, it will compare the output with the existing snapshot. Creating a snapshot is really easy. After you mount your component, you should just call the expectation toMatchSnapshot on this component's HTML:

let $html = $mounted.$el.outerHTML
expect($html).toMatchSnapshot()

I will run snapshot testing for all the pages inside one test suite file. Before doing that, I will mock the getters of our Vuex store because there are some pages that use the user object, which is not initialized, thus resulting in an...