Dependency Injection with AngularJS

78 Pages·2013·3.68 MB·English

by  Alex Knol

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Dependency Injection with
AngularJS
Design, control, and manage your dependencies with
AngularJS dependency injection
Alex Knol
BIRMINGHAM - MUMBAI
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Dependency Injection with AngularJS
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First published: December 2013
Production Reference: 1111213
Published by Packt Publishing Ltd.
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Birmingham B3 2PB, UK.
ISBN 978-1-78216-656-6
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Cover Image by Abhishek Pandey ([email protected])
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Credits
Author Project Coordinator
Alex Knol Sherin Padayatty
Reviewers Proofreader
Iwan van Staveren Simran Bhogal
Ruoyu Sun
Indexer
Rekha Nair
Acquisition Editor
James Jones
Production Coordinator
Kyle Albuquerque
Commissioning Editor
Neil Alexander
Cover Work
Kyle Albuquerque
Technical Editors
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Dennis John
Copy Editors
Alisha Aranha
Roshni Banerjee
Tanvi Gaitonde
Gladson Monteiro
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About the Author
Alex Knol is a lifelong tech geek with a passion for automation. After spending some
years away from software development, around the beginning of this century, he took
up PHP development based on his early experiences with C and Pascal. Surprisingly,
he has never really used web tools, but applications instead, to make websites, such as
the platform that's driving kaizegine.com. Having built various applications using
web technologies and frameworks, such as Symfony, he discovered AngularJS at the
beginning of 2008, while searching for a way to structure frontend application code
and make development easy. He used AngularJS, among other technologies, for a
job-matching project in the Netherlands and, more recently, for an online website
designer named Risingtool.com.
I'd like to thank the AngularJS team for continuously improving the
framework and documentation; my employer, Risingtool.com,
for allowing me to work on this book, partly on their time. This book
also took time away from my family time, for which I'd like to thank
my wife and children.
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About the Reviewers
Iwan van Staveren is a software architect. He has over 14 years of experience in
developing all kinds of web applications. He loves working with the Symfony2 and
AngularJs frameworks. He is owner of the privately-owned E-one Software.
Ruoyu Sun is a designer and developer living in Hong Kong. He is passionate
about programming and has been contributing to several open source projects.
He has founded several tech startups, using a variety of technologies, before going
into the IT industry. He is the author of the book Designing for XOOPS, O'Reilly
Media, July 2011.
I would like to thank all my friends and family who have always
supported me.
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Table of Contents
Preface 1
Chapter 1: Learning to Fly 5
Let's get going 5
Adding a controller 8
What about routes? 9
Showing a list 11
Adding a filter 12
Chart directives 13
Using services 15
Summary 16
Chapter 2: Better Code 17
Wiring up the backend 17
Duplicating code 19
Angular service to the rescue 21
The theory behind Dependency Injection 24
Summary 28
Chapter 3: The Magic 29
Application flow 29
Different ways of injecting 31
Summary 34
Chapter 4: Testing 35
Test automation 35
Test your code, not the framework 37
Testing the parts 37
The Karma test runner 47
End-to-end testing 50
Setting up the Protractor 51
Summary 54
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Table of Contents
Chapter 5: Large Applications 55
Organizing your application 55
Going a bit larger 57
Organizing using dynamic teams 58
Using modules 58
Organizing using directives 60
Nesting controllers 60
More powerful nesting 61
Application communication 62
Events 62
Let the model speak 62
Summary 63
Index 65
[ ii ]
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Preface
Dependency Injection is a term often used in the world of object-oriented software
design. AngularJS depends on it at its core. This book teaches you why and how to
use Dependency Injection with AngularJS.
What this book covers
Chapter 1, Learning to Fly, will take you through the basics of an Angular
application. This chapter prepares a sample app that will be used throughout
the examples in the book.
Chapter 2, Better Code, takes you from bad coding practices to maintainable
and testable software using Dependency Injection. It also shows you the
theory of Dependency Injection and some of its positive effects.
Chapter 3, The Magic, is a technical explanation of how Dependency Injection
can be used with AngularJS and the caveats to watch out for.
Chapter 4, Testing, is a chapter that will show you the advantages that Dependency
Injection brings when testing your application. Integration testing and unit testing
are covered. The set up and use of recommended AngularJS testing frameworks
are covered as well.
Chapter 5, Large Applications, will show you ways to implement the theory
and techniques used in large applications. The result will be less code and
better maintainability.
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