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Master BDD to deliver higher-value software more quickly
To develop high-value products quickly, software development teams need better ways to collaborate. Agile methods like Scrum and Kanban are helpful, but they’re not enough. Teams need better ways to work inside each sprint or work item. Behavior-driven development (BDD) adds just enough structure for product experts, testers, and developers to collaborate more effectively.
Drawing on extensive experience helping teams adopt BDD, Richard Lawrence and Paul Rayner show how to explore changes in system behavior with examples through conversations, how to capture your examples in expressive language, and how to flow the results into effective automated testing with Cucumber. Where most BDD resources focus on test automation, this guide goes deep into how BDD changes team collaboration and what that collaboration looks like day to day. Concrete examples and practical advice will prepare you to succeed with BDD, whatever your context or role.
· Learn how to collaborate better by using concrete examples of system behavior
· Identify your project’s meaningful increment of value so you’re always working on something important
· Begin experimenting with BDD slowly and at low risk
· Move smoothly from informal examples to automated tests in Cucumber
· Use BDD to deliver more frequently with greater visibility
· Make Cucumber scenarios more expressive to ensure you’re building the right thing
· Grow a Cucumber suite that acts as high-value living documentation
· Sustainably work with complex scenario data
· Get beyond the “mini-waterfalls” that often arise on Scrum teams
Chapter 1: Focusing on Value
When Scrum Isn’t Enough
Finding a High-Value Feature to Start With
Before You Start with Cucumber
Finding the First MMF
Slicing an MMF into User Stories
Chapter 2: Exploring with Examples
BDD Is a Cooperative Game
BDD Is a Whole Team Thing
Allow Time and Space to Learn
Flesh Out the Happy Path First
Use Real Examples
Example Mapping Gives the Discussion Structure
Optimizing for Discovery
Addressing Some Concerns
Treat Resistance as a Resource
Playing the BDD Game
Chapter 3: Formalizing Examples into Scenarios
Moving from Examples to Scenarios
Feature Files as Collaboration Points
BDD Is Iterative, Not Linear
Finding the Meaningful Variations
Gherkin: A Language for Expressive Scenarios
Chapter 4: Automating Examples
The Test Automation Stack
Adjusting to Working Test-First
Annotating Element Names in Mockups
How Does User Experience Design Fit In to This?
Did They Really Just Hard Code Those Results?
Anatomy of a Step Definition
Simple Cucumber Expressions
Wildcards and Quantifiers
Capturing and Not Capturing
Custom Cucumber Expressions Parameter Types
Slow Is Normal (at First)
Choose Cucumber Based on Audience, Not Scope
Chapter 5: Frequent Delivery and Visibility
How BDD Changes the Tester’s Role
BDD and Automated Builds
Faster Stakeholder Feedback
How Getting to Done More Often Changes All Sorts of Things
Frequent Visibility and Legacy Systems
Documentation: Integrated and Living
Avoiding Mini-Waterfalls and Making the Change Stick
Chapter 6: Making Scenarios More Expressive
Feedback About Scenarios
How to Make Your Scenarios More Expressive
Finding the Right Level of Abstraction
Including the Appropriate Details
Expressive Language in the Steps
Good Scenario Titles
Chapter 7: Growing Living Documentation
What Is Living Documentation and Why Is It Better?
Cucumber Features and Other Documentation
Avoid Gherkin in User Story Descriptions
The Unexpected Relationship Between Cucumber Features and User Stories
Growing and Splitting Features
Split When Backgrounds Diverge
Split When a New Domain Concept Emerges
Secondary Organization Using Tags
Structure Is Emergent
Chapter 8: Succeeding with Scenario Data
Characteristics of Good Scenarios
When to Share Data
Raising the Level of Abstraction with Data Personas
Chapter 9: Conclusion
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