Unit Testing | Node Web Development - Second Edition

Sign In Start Free Trial

Book Overview & Buying
Table Of Contents

Node Web Development - Second Edition - Second Edition

By : David Herron

4 (1)

Node Web Development - Second Edition

4 (1)

By: David Herron

Overview of this book

Presented in a simple, step-by-step format, this book is an introduction to web development with Node.This book is for anybody looking for an alternative to the P languages (Perl, PHP, Python), or anyone looking for a new paradigm of server-side application development.The reader should have at least a rudimentary understanding of JavaScript and web application development.

Node Web Development Second Edition

Node Web Development Second Edition

Credits

Credits

About the Author

About the Author

Acknowledgement

Acknowledgement

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Preface

Free Chapter

About Node

About Node

The capabilities of Node

Why should you use Node?

What's in a name – Node, Node.js, or Node.JS?

Summary

Setting up Node

Setting up Node

System requirements

Installing Node using package managers

Installing the StrongLoop Node distribution

Installing from source on POSIX-like systems

Installing developer tools on Mac OS X

Run a few commands; testing the commands

npm – the Node package manager

Starting Node servers at system startup

Summary

Node Modules

Node Modules

Defining a module

Node package manager

Summary

HTTP Servers and Clients – A Web Application's First Steps

HTTP Servers and Clients – A Web Application's First Steps

Sending and receiving events with EventEmitters

HTTP server applications

HTTP Sniffer – listening to the HTTP conversation

Web application frameworks

Getting started with Express

Calculating the Fibonacci sequence with Express

Making HTTP Client requests

Calling a REST backend service from an Express application

Summary

Implementing a Simple Express Application

Implementing a Simple Express Application

Express and the MVC paradigm

Creating the Notes application code

Changing the look of an Express application

Scaling up and running multiple instances

Summary

Data Storage and Retrieval

Data Storage and Retrieval

Asynchronizing the Notes application

Storing notes in files

Storing notes with the LevelUP data store

Storing notes in SQL – SQLite3

Storing notes the ORM way with the Sequelize module

Storing notes in MongoDB with Mongoose

Summary

Multiuser Authorization, Deployment, Scaling, and Hosting

Multiuser Authorization, Deployment, Scaling, and Hosting

User authentication

Deploying Notes on Debian

Scaling to use all cores on multi-core servers

Deploying Notes on cloud hosting (AppFog)

Summary

Dynamic Interaction between the Client and Server Application

Dynamic Interaction between the Client and Server Application

Adding real-time web features to Notes

Introducing Socket.IO

Initializing Socket.IO with Express

Events between the Notes server and client code

Running the Notes application with Socket.IO

Sending messages between users

Summary

Unit Testing

Unit Testing

Testing asynchronous code

Assert – the simplest testing methodology

Testing a model

Testing router functions

Making it easy to run the tests

Summary

Index

Index

Testing router functions

Now that we've seen a little bit about testing a data model, let's move on to testing the route functions. There is obviously a lot more to test in the Notes data models, such as the user model. Our goal in this chapter is not to produce a complete test suite, but to introduce you to unit testing in Node.

In unit testing the route functions, we have a little more freedom in mocking out the other modules. We can fairly easily create a faux data model, and can even bypass Express completely. Let's see how it's done.

Let's start with the faux data model. It can also be used as an in-memory data model in the Notes application, if you like. In the test directory, create a file named mock-model.js containing the following:

var events = require('events');
var emitter = module.exports.emitter = new events.EventEmitter();

var notes = [];

exports.connect = function(params, callback) {
    callback();
}

exports.disconnect = function(callback) {
    callback();
}

exports.update...

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Node Web Development - Second Edition

Search

Your notes and bookmarks