Testable JavaScript

Ensuring Reliable Code

Mark Ethan Trostler (Autor)

Buch | Softcover

274 Seiten

2013
O'Reilly Media, Inc, USA (Verlag)
978-1-4493-2339-4 (ISBN)

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One skill that’s essential for any professional JavaScript developer is the ability to write testable code. This book shows you what writing and maintaining testable JavaScript for the client- or server-side actually entails, whether you’re creating a new application or rewriting legacy code.

From methods to reduce code complexity to unit testing, code coverage, debugging, and automation, you’ll learn a holistic approach for writing JavaScript code that you and your colleagues can easily fix and maintain going forward. Testing JavaScript code is complicated. This book helps you simply the process considerably.

Get an overview of Agile, test-driven development, and behavior-driven development
Use patterns from static languages and standards-based JavaScript to reduce code complexity
Learn the advantages of event-based architectures, including modularity, loose coupling, and reusability
Explore tools for writing and running unit tests at the functional and application level
Generate code coverage to measure the scope and effectiveness of your tests
Conduct integration, performance, and load testing, using Selenium or CasperJS
Use tools for in-browser, Node.js, mobile, and production debugging
Understand what, when, and how to automate your development processes

Mark Ethan Trostler has been writing and testing code for over 20 years. From humble beginnings as a Computer Science/Philosophy double major at UC San Diego, to working at both startups (IPivot) and large corporations (Qualcomm, Intel, Redback Networks, Juniper Networks, and currently Yahoo!) he has always been dedicated to code quality. Currently as a Senior Principal Front End Engineer on the Yahoo Mail team, he helps spearhead the unit testing initiative for the latest rewrite of Yahoo Mail. He has spoken at several internal and external conferences (Yahoo TechPulse 2010 and upcoming in 2011, Yahoo's Front End Summit, and most recently at YUIConf 2011) about Testable Javascript and is the author of the Open Source Javascript Unit Test Environment.

Chapter 1 Testable JavaScript
Prior Art
Code Is for People
Beyond Application Code
Recap
Chapter 2 Complexity
Code Size
JSLint
Cyclomatic Complexity
Reuse
Fan-Out
Fan-In
Coupling
Coupling Metrics
Coupling in the Real World
Dependency Injection
Comments
The Human Test
Recap
Chapter 3 Event-Based Architectures
The Benefits of Event-Based Programming
The Event Hub
Web-Based Applications
Testing Event-Based Architectures
Caveats to Event-Based Architectures
A Smarter Hub: The Event Switch
Recap
Chapter 4 Unit Tests
A Framework
Let’s Get Clean
Writing Good Tests
Real-World Testing
Running Tests: Client-Side JavaScript
Running Tests: Server-Side JavaScript
Recap
Chapter 5 Code Coverage
Coverage Basics
Code Coverage Data
A Hands-on Example
Exercise/Deploy
Persisting Coverage Information
Generating Output
Aggregation
Hidden Files
Coverage Goals
Recap
Chapter 6 Integration, Performance, and Load Testing
Integration Testing
Performance Testing
Load Testing
Tracking Resource Usage
Recap
Chapter 7 Debugging
In-Browser Debugging
Node.js Debugging
Remote Debugging
Mobile Debugging
Production Debugging
Recap
Chapter 8 Automation
What to Automate
When to Automate
How to Automate
Recap
Colophon

Erscheint lt. Verlag	5.3.2013
Zusatzinfo	Illustrations
Verlagsort	Sebastopol
Sprache	englisch
Maße	191 x 235 mm
Gewicht	440 g
Einbandart	kartoniert
Themenwelt	Informatik ► Web / Internet ► JavaScript
ISBN-10	1-4493-2339-1 / 1449323391
ISBN-13	978-1-4493-2339-4 / 9781449323394
Zustand	Neuware