Book Image

Learning Node.js for .NET Developers

Book Image

Learning Node.js for .NET Developers

Overview of this book

Node.js is an open source, cross-platform runtime environment that allows you to use JavaScript to develop server-side web applications. This short guide will help you develop applications using JavaScript and Node.js, leverage your existing programming skills from .NET or Java, and make the most of these other platforms through understanding the Node.js programming model. You will learn how to build web applications and APIs in Node, discover packages in the Node.js ecosystem, test and deploy your Node.js code, and more. Finally, you will discover how to integrate Node.js and .NET code.
Table of Contents (21 chapters)
Learning Node.js for .NET Developers
About the Author
About the Reviewer

Writing a simple test in Node.js

Node.js comes with a built-in module called assert that can be used for testing. We can use it to write a simple test for the games service that we wrote in Chapter 5 , Building Dynamic Websites. We add the following code under gameServiceTest.js:

'use strict';

let assert = require('assert');
let service = require('./services/games.js')

// Given
service.create('firstUserId', 'testing');

// When
let games = service.availableTo('secondUserId');

// Then            
assert.equal(games.length, 1);            
let game = games[0];
assert.equal(game.setBy, 'firstUserId');
assert.equal(game.word, 'TESTING');

Note that the assert.equal function takes the actual value as the first argument and the expected value as the second argument. This is the opposite way around to JUnit's built-in Assert.Equals, and the classic-style Assert.AreEqual in NUnit. It's important to get these parameters the right way around so that they appear correctly in error messages when an...