Paradigm Shift in Software Testing
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Paradigm Shift in Software Testing

Practical Guide for Developers and Testers

About the Book

Forget the false assumption that bugs are inevitable in software. Discover most of the faults with our new test design techniques!

Two brand new techniques are introduced here. Both action-state testing and general predicate testing are proved to be efficient, by which you can find almost all the bugs in your code, where the code represents any stateful application or represents any business logic with boundaries.

Action-state testing is a unified technique of state transition testing and use case testing. It has all the advantages of both techniques and eliminates their shortcomings. Not only does your code quality improve but the total SDLC cost decreases as well.

General predicate testing (GPT) is a generalization of boundary value analysis, by which all the erroneously coded or tested predicate bugs can be revealed with the help of a minimised test set. The minimisation process can fully be automated.

Apply our LEA methodology:

Learn this book, then

Exercise test design using our website, finally

Apply our techniques in your projects and find almost all the bugs.

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  • Categories

    • Testing
    • Automated Software Testing
    • Software Engineering
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About the Editors

István Forgács
István Forgács

István Forgács PhD is an entrepreneur, a test expert and an author. He is the founder and CEO of 4TestDev. István is the co-author of the book Agile Testing Foundations. He is the creator and key contributor of the test-first, codeless test design automation tool Harmony.

István and Attila published their first common book Practical Test Design in 2019. Their website is a unique place where you can exercise test design by executing and improving your tests. They introduced three test design techniques: combinative testing, action-state testing and general predicate testing.

Attila Kovács
Attila Kovács

Attila Kovács is a full professor of the Eötvös Loránd University, Budapest. He is an ISTQB, IREB and Agile trainer, a project leader, a consultant in the fields of software engineering and testing.

Reader Testimonials

Harry M. Sneed
Harry M. Sneed

IEEE Stevens Award Winner 2009, ISTQB® International Software Testing Excellence Award Winner 2013

The book is extremely useful for teaching advanced testing techniques. The fact that many examples are taken from real life systems heightens their value.

Matthias Hamburg
Matthias Hamburg

ISTQB® Glossary Working Group Chair and Advanced Level Test Analyst Product Owner

The authors succeed in creating an innovative approach to software testing at the cutting edge of our time, by orchestrating state-of-the-art research results, novel test techniques, risk-based testing, incremental test design, collaboration, and automation.

Table of Contents

  • Authors
  • Foreword
  • Acknowledgments
  • Abbreviations
  • Glossary
  • 1 Introduction
  • 2 Software, bugs, pesticides
    • 2.1 The lifetime of bugs: from cradle to coffin
    • 2.2 Pesticides against software bugs
    • 2.3 The testing lifecycle
    • 2.4 Why is risk analysis really necessary?
    • 2.5 Bug classification via detection difficulty
    • 2.6 Fault-based testing
  • 3 Action-state testing
    • 3.1 Problems with the test design of stateful applications
    • 3.2 Bug hunting with action-state testing
    • 3.3 Example Car Rental
    • 3.4 When a stronger criterion is required – a real bug
    • 3.5 Summary
  • 4 From EP and BVA to general predicate testing
    • 4.1 Equivalence partitioning
    • 4.2 BVA testing
    • 4.3 General predicate testing
    • 4.4 Safety-critical aspects
    • 4.5 Measuring the design time
    • 4.6 Action-state testing with general predicate testing
    • 4.7 Summary
  • 5 Developers and testers should constitute a successful team
    • 5.1 How developers can help testers
    • 5.2 How testers can help developers
    • 5.3 Developer – tester synergies
    • 5.4 Summary
  • 6 Conclusion
  • References
  • Appendix

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