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ATDD by Example

ATDD by Example

A Practical Guide to Acceptance Test-Driven Development

Markus Gärtner, Markus G¿rtner

Jul 2012, Paperback, 240 pages
ISBN13: 9780321784155
ISBN10: 0321784154
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With Acceptance Test-Driven Development (ATDD), business customers, testers, and developers can collaborate to produce testable requirements that help them build higher quality software more rapidly. However, ATDD is still widely misunderstood by many practitioners. ATDD by Example is the first practical, entry-level, hands-on guide to implementing and successfully applying it.

ATDD pioneer Markus Gärtner walks readers step by step through deriving the right systems from business users, and then implementing fully automated, functional tests that accurately reflect business requirements, are intelligible to stakeholders, and promote more effective development.

Through two end-to-end case studies, Gärtner demonstrates how ATDD can be applied using diverse frameworks and languages. Each case study is accompanied by an extensive set of artifacts, including test automation classes, step definitions, and full sample implementations. These realistic examples illuminate ATDD’s fundamental principles, show how ATDD fits into the broader development process, highlight tips from Gärtner’s extensive experience, and identify crucial pitfalls to avoid. Readers will learn to

  • Master the thought processes associated with successful ATDD implementation
  • Use ATDD with Cucumber to describe software in ways businesspeople can understand
  • Test web pages using ATDD tools
  • Bring ATDD to Java with the FitNesse wiki-based acceptance test framework
  • Use examples more effectively in Behavior-Driven Development (BDD)
  • Specify software collaboratively through innovative workshops
  • Implement more user-friendly and collaborative test automation
  • Test more cleanly, listen to test results, and refactor tests for greater value

If you’re a tester, analyst, developer, or project manager, this book offers a concrete foundation for achieving real benefits with ATDD now–and it will help you reap even more value as you gain experience.

Foreword by Kent Beck xi

Foreword by Dale Emery xiii

Preface xv

Acknowledgments xxi

About the Author xxiii

Part I: Airport Parking Lot 1

Chapter 1: Parking Cost Calculator Workshop 3

Valet Parking 3

Short-Term Parking 5

Economy and Long-Term Parking 6

Essential Examples 9

Summary 12

Chapter 2: Valet Parking Automation 17

The First Example 18

Pairing for the First Test 25

Tabulated Tests 36

Summary 39

Chapter 3: Automating the Remaining Parking Lots 41

Short-Term Parking Lot 41

Economy Parking Lot 44

Summary 46

Chapter 4: Wish and Collaborate 47

Specification Workshops 48

Wishful Thinking 49

Collaboration 50

Summary 52

Part II: Traffic Light Software System 53

Chapter 5: Getting Started 55

Traffic Lights 55

FitNesse 58

Supporting Code 59

Summary 60

Chapter 6: Light States 61

State Specifications 61

The First Test 62

Diving into the Code 66

Refactoring 70

Summary 90

Chapter 7: First Crossing 93

Controller Specifications 93

Driving the Controller 94

Summary 118

Chapter 8: Discover and Explore 119

Discover the Domain 120

Drive the Production Code 121

Test Your Glue Code 122

Value Your Glue Code 124

Summary 125

Part III: Principles of Acceptance Test-Driven Development 127

Chapter 9: Use Examples 129

Use a Proper Format 130

Refine the Examples 142

Cut Examples 146

Consider Gaps 149

Summary 151

Chapter 10: Specify Collaboratively 153

Meet the Power of Three 153

Hold Workshops 155

Trawl Requirements 158

Summary 159

Chapter 11: Automate Literally 161

Use Friendly Automation 162

Collaborate on Automation 164

Discover the Domain 166

Summary 167

Chapter 12: Test Cleanly 169

Develop Test Automation 170

Listen to the Tests 172

Refactor Tests 176

Summary 180

Chapter 13: Successful ATDD 183

Appendix A: Cucumber 187

Feature Files 187

Step Definitions 188

Production Code 189

Appendix B: FitNesse 191

Wiki Structure 191

SLiM Tables 192

Support Code 193

Appendix C: Robot Framework 195

Sections 195

Library Code 199

References 201

Index 205

Markus Gärtner, works as an agile tester, trainer, coach, and consultant with it-agile GmbH, in Hamburg, Germany. He founded the German Agile Testing and Exploratory workshop in 2011, and cofounded the European chapter of Weekend Testing in 2010. A black-belt instructor in the Miagi-Do school of software testing, he contributes to the Agile Alliance FTT-Pattern writing community and the Software Craftsmanship movement. Gärtner regularly presents at agile and testing conferences around the world, has written extensively about agile testing, and regularly teaches ATDD and context-driven testing. He blogs at