Home > Store

Developer Testing: Building Quality into Software

Developer Testing: Building Quality into Software

eBook (Watermarked)

  • Your Price: $25.59
  • List Price: $31.99
  • Includes EPUB, MOBI, and PDF
  • About eBook Formats
  • This eBook includes the following formats, accessible from your Account page after purchase:

    ePub EPUB The open industry format known for its reflowable content and usability on supported mobile devices.

    MOBI MOBI The eBook format compatible with the Amazon Kindle and Amazon Kindle applications.

    Adobe Reader PDF The popular standard, used most often with the free Adobe® Reader® software.

    This eBook requires no passwords or activation to read. We customize your eBook by discreetly watermarking it with your name, making it uniquely yours.

Also available in other formats.

Register your product to gain access to bonus material or receive a coupon.

About

Additional Information

Download the sample pages (includes Chapter 4 and the Index.)

Description

  • Copyright 2017
  • Dimensions: 7" x 9-1/8"
  • Pages: 352
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 0-13-443180-4
  • ISBN-13: 978-0-13-443180-2

How do successful agile teams deliver bug-free, maintainable software—iteration after iteration? The answer is: By seamlessly combining development and testing. On such teams, the developers write testable code that enables them to verify it using various types of automated tests. This approach keeps regressions at bay and prevents “testing crunches”—which otherwise may occur near the end of an iteration—from ever happening. Writing testable code, however, is often difficult, because it requires knowledge and skills that cut across multiple disciplines.

In Developer Testing, leading test expert and mentor Alexander Tarlinder presents concise, focused guidance for making new and legacy code far more testable. Tarlinder helps you answer questions like: When have I tested this enough? How many tests do I need to write? What should my tests verify? You’ll learn how to design for testability and utilize techniques like refactoring, dependency breaking, unit testing, data-driven testing, and test-driven development to achieve the highest possible confidence in your software. Through practical examples in Java, C#, Groovy, and Ruby, you’ll discover what works—and what doesn’t.

You can quickly begin using Tarlinder’s technology-agnostic insights with most languages and toolsets while not getting buried in specialist details. The author helps you adapt your current programming style for testability, make a testing mindset “second nature,” improve your code, and enrich your day-to-day experience as a software professional. With this guide, you will

  • Understand the discipline and vocabulary of testing from the developer’s standpoint
  • Base developer tests on well-established testing techniques and best practices
  • Recognize code constructs that impact testability
  • Effectively name, organize, and execute unit tests
  • Master the essentials of classic and “mockist-style” TDD
  • Leverage test doubles with or without mocking frameworks
  • Capture the benefits of programming by contract, even without runtime support for contracts
  • Take control of dependencies between classes, components, layers, and tiers
  • Handle combinatorial explosions of test cases, or scenarios requiring many similar tests
  • Manage code duplication when it can’t be eliminated
  • Actively maintain and improve your test suites
  • Perform more advanced tests at the integration, system, and end-to-end levels
  • Develop an understanding for how the organizational context influences quality assurance
  • Establish well-balanced and effective testing strategies suitable for agile teams

Sample Content

Table of Contents

Foreword by Jeff Langr xiii

Foreword by Lisa Crispin xv

Preface xvii

Acknowledgments xxiii

About the Author xxv

Chapter 1: Developer Testing 1

Developers Test 1

Developer Testing Activities 2

What Developers Usually Don’t Do 5

Defining Developer Testing 6

Developer Testing and the Development Process 7

Summary 8


Chapter 2: Testing Objectives, Styles, and Roles 9

Testing and Checking 9

Testing Objectives 10

Testing Styles 11

Your Quality Assurance and Developer Testing 18

Summary 19

Chapter 3: The Testing Vocabulary 21

Errors, Defects, Failures 22

White Box and Black Box Testing 22

Classifying Tests 23

The Agile Testing Quadrants 32

Some Other Types of Testing 33

Summary 36

Chapter 4: Testability from a Developer’s Perspective 37

Testable Software 37

Benefits of Testability 39

Testability Defined 43

Summary 55

Chapter 5: Programming by Contract 57

Contracts Formalize Constraints 57

Implementing Programming by Contract 60

Enforcing Contracts 62

Summary 65

Chapter 6: Drivers of Testability 67

Direct Input and Output 68

Indirect Input and Output 68

State 70

Temporal Coupling 71

Data Types and Testability 72

Domain-to-Range Ratio 77

Summary 78

Chapter 7: Unit Testing 79

Why Do It? 79

What Is a Unit Test? 81

The Life Cycle of a Unit Testing Framework 83

Naming Tests 85

Structuring Tests 88

Assertion Methods 89

Testing Exceptions 99

Behavior-driven Development–Style Frameworks 102

Summary 105

Chapter 8: Specification-based Testing Techniques 107

Equivalence Partitioning 107

Boundary Value Analysis 110

Edge Cases and Gotchas for Some Data Types 111

State Transition Testing 113

Decision Tables 115

Summary 116

Chapter 9: Dependencies 119

Relations between Objects 119

System Resource Dependencies 125

Dependencies between Layers 129

Dependencies across Tiers 132

Summary 133

Chapter 10: Data-driven and Combinatorial Testing 135

Parameterized Tests 138

Theories 139

Generative Testing 141

Combinatorial Testing 145

Summary 149

Chapter 11: Almost Unit Tests 151

Examples 152

Impact 156

Summary 157

Chapter 12: Test Doubles 159

Stubs 159

Fakes 162

Mock Objects 164

Spies 170

Dummies 171

Verify State or Behavior? 173

Summary 176

Chapter 13: Mocking Frameworks 177

Constructing Test Doubles 177

Setting Expectations 179

Verifying Interactions 183

Misuse, Overuse, and Other Pitfalls 185

Summary 189

Chapter 14: Test-driven Development—Classic Style 191

Test-driving a Simple Search Engine 192

Order of Tests 204

Red- to Green-bar Strategies 205

Challenges 206

Test First or Test Last? 209

Summary 210

Chapter 15: Test-driven Development—Mockist Style 213

A Different Approach 213

Double-loop TDD 220

Summary 223

Chapter 16: Duplication 225

Why Duplication Is Bad 225

Taking Advantage of Duplication 227

Mechanical Duplication 228

Knowledge Duplication 232

Summary 235

Chapter 17: Working with Test Code 237

Commenting Tests 237

Deleting Tests 241

Summary 243

Chapter 18: Beyond Unit Testing 245

Tests that Aren’t Unit Tests 245

Characteristics of Tests that Aren’t Unit Tests 257

Pointers and Practices 263

Deciding on a Developer Testing Strategy 267

Summary 269

Chapter 19: Test Ideas and Heuristics 271

High-level Considerations 271

Low-level Considerations 274

Summary 276

Appendix A: Tools and Libraries 277

Appendix B: Source Code 279

Test Doubles 279

Data-driven and Combinatorial Testing 279

Test-driven Development 282

Beyond Unit Testing 287

Bibliography 289

Index 295

Updates

Submit Errata

More Information

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020