Evolutionary Anatomy of Test Automation Code
Evolutionary Anatomy of Test Automation Code
About the Book
Many people agree that one important outcome of Behavior Driven Development is a set of regression tests to demonstrate the desired behavior and ensure that it is maintained over time. Then they often struggle to do so in a manner that remains maintainable as the system and the test code grows larger. Sometimes they even abandon their tests and start over, repeatedly.
In this book we demonstrate the changing needs as the application and suite of tests grow. We identify some of the patterns that help us manage the complexity over time.
The book uses an racehorse fortune-telling application, EquineHoroscope (https://github.com/gdinwiddie/EquineHoroscope) for illustration. The code is in Java, and the tests use Cucumber and JUnit. The IDE is Eclipse. The concepts and patterns, however, are useful in other languages and tools.
Some of the lessons:
- How and when to shift focus between business and programmer levels
- Extracting "helper" code out of test scenarios
- Giving meaningful shape to "helper" code
- Articulating layers of test code
This first publication coincides with the Agile Alliance Technical Conference 2016 in Raleigh North Carolina. Attendees to my session on this topic (http://aatc2016.sched.org/event/5ycy/evolutionary-anatomy-of-test-automation-code-george-dinwiddie) will be given a coupon code for a free copy of this book.
I anticipate that the book will grow over time, as I have more patterns to describe. I'd also love to learn the patterns you've identified in your test suites.
- About this edition
- “Gitting” the Code
- Using Eclipse
- Using Maven
- Using Ant
- It starts with an Idea
- From one brain to another
- Example Mapping
- Rules and Examples
Developing From Nothing
- The Simplest Scenario
- What have we accomplished?
- Dropping down to “Programmer Tests”
- The Problem with External Dependencies
- Isolating our Code
- Breaking the Problem in Half
- Remaining Risks
- Permutations tested sufficiently at a lower level
- Cases covered by more advanced tests might be obsolete
- Cases that better identify a problem might be worth keeping
- Non-deterministic tests ‘might’ be useful
- Step Definitions
- Two Layer Tests
- Cohesive Feature Files
- Three Layer Tests
- Utility classes
- System adapters
- Four Layer Tests
Writing For The Future
- Readable Code
- Naming Tests
- Organizing Scenarios into Features
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