Mockito Essentials

Sujoy Acharya

• Publisher: Packt Publishing
• Year: 2014
• Edition: 1
• eBook ISBN:
  9781783983605
• Topic: Computer Science
• Subtopic: Programming in Java
• Index: Computer Science

Whether you are new to JUnit testing and mocking or a seasoned Mockito expert, this book will provide you with the skills you need to successfully build and maintain meaningful JUnit test cases and effectively mock external dependencies. At the beginning, this book deals with dummy and fake objects and then moves on to exploring stubs followed by an example on spying. Then, it will show you how to make legacy code testable, mock external dependencies using Mockito, and write testable code for greenfield projects. You will also gain an insight on the concepts of Service-oriented Architecture (SOA) as well as understand how to unit test RESTful web services with Mockito. By sequentially working through the steps in each chapter, you will quickly learn the features of Mockito.

Mockito Essentials will ensure your success with these concepts, tools, and frameworks.

Mockito Essentials

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Table of Contents

Mockito Essentials

Credits

About the Author

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Exploring Test Doubles

Working with unit tests

Understanding test doubles

Using dummy objects

Working with stubs

Exploring a test spy

Getting started with mock objects

Implementing fake objects – simulators

Summary

2. Socializing with Mockito

Exploring Mockito

Exploring unit test qualities

Realizing the significance of Mockito

Working with Mockito

Adding a Mockito dependency

Stubbing method calls

Throwing exceptions

Using argument matchers

Working with wildcard matchers

Working with a custom ArgumentMatcher class

Comparison matchers – equalTo, is, and not

Compound value matchers – either, both, anyOf, allOf, and not

Verifying method calls

Verifying zero and no-more interactions

Answering method calls

Understanding the Mockito architecture

Summary

3. Accelerating Mockito

Learning advanced Mockito features

Working with void methods

Throwing exceptions from void methods

Working with void method callbacks

Learning doCallRealMethod and doNothing

Exploring doReturn

Verifying arguments using ArgumentCaptor

Working with generic collection arguments

Working with variable arguments and arrays

Verifying an invocation order

Spying objects

Exploring Mockito annotations

Changing the default Mockito settings

Resetting mock objects

Working with inline stubbing

Determining mock details

Summary

4. Behavior-driven Development with Mockito

Understanding the context of BDD

Exploring the top-down strategy

Exploring the bottom-up strategy

Finding the gaps

Exploring BDD

Exercising BDD with Mockito

The BDD syntax

Summary

5. Unit Testing the Legacy Code with Mockito

Understanding the legacy code

Exploring testing impediments

Working with PowerMock

Stubbing static methods

Suppressing static blocks

Suppressing a superclass constructor

Suppressing our own constructor

Suppressing methods

Stubbing private methods

Stubbing final methods

Mocking final classes

Designing for testability with Mockito

Identifying constructor issues

Realizing initialization issues

Working with private methods

Working with final methods

Exploring static method issues

Working with final classes

Learning new concerns

Exploring static variables and blocks

Summary

6. Developing SOA with Mockito

Exploring Service-oriented Architecture (SOA)

Working with web services

Exploring JAX-WS with Eclipse

Developing a RESTful web service

Building a RESTful web service with Spring Framework

Summary

7. Unit Testing GWT Code with Mockito

Exploring Ajax and GWT

Learning the MVP pattern

Developing a GWT application using MVP

Unit testing the GWT code

Summary

Index

Mockito Essentials

Copyright © 2014 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: October 2014

Production reference: 1171014

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78398-360-5

www.packtpub.com

Cover image by Asher Wishkerman (<[email protected]>)

Credits

Author

Sujoy Acharya

Reviewers

Christian Baranowski

Tim Perry

Gualtiero Testa

Commissioning Editor

Amarabha Banerjee

Acquisition Editor

James Jones

Content Development Editor

Pooja Nair

Technical Editor

Humera Shaikh

Copy Editors

Dipti Kapadia

Shambhavi Pai

Project Coordinator

Leena Purkait

Proofreaders

Simran Bhogal

Cathy Cumberlidge

Indexers

Mariammal Chettiyar

Tejal Soni

Graphics

Shee...

Table of contents

• Mockito Essentials