Behavior Driven Development (BDD)
Behavior Driven Development (BDD) is a development approach that promotes collaboration between developers, testers, and domain experts.
Classification
- ComplexityMedium
- Impact areaTechnical
- Decision typeDesign
- Organizational maturityIntermediate
Technical context
Principles & goals
Use cases & scenarios
Compromises
- Misinterpretation of requirements.
- Insufficient testing.
- Lack of acceptance within the team.
- Documentation of all scenarios.
- Regular review of tests.
- Use of clearly defined guidelines.
I/O & resources
- User Stories
- Acceptance Criteria
- Specification Documents
- Working Software
- Complete Test Suite
- Documented Requirements
Description
BDD encourages the definition of software behavior in natural language, contributing to better communication and understanding. The use of tests that are understandable to both domain experts and technical staff improves quality and reduces misunderstandings.
✔Benefits
- Improved software quality.
- Fewer misunderstandings.
- Promotes collaboration.
✖Limitations
- Dependency on domain knowledge.
- Possible over-complexity.
- Not suitable for all projects.
Trade-offs
Metrics
- Defect Rate
Number of defects per tested feature.
- Test Coverage
Percentage of requirements tested.
- Deployment Frequency
Frequency of software change deployments.
Examples & implementations
Online Store
An online store that uses BDD to define its checkout pipeline.
Social Networking App
An app that uses BDD to clearly articulate requirements and integrate user feedback.
Financial Software
A software solution that applies BDD to meet security requirements.
Implementation steps
Organize an introduction workshop.
Train the team in BDD.
Develop scenarios together.
⚠️ Technical debt & bottlenecks
Technical debt
- Insufficient test automation.
- Untreated technical debts.
- Lack of documentation.
Known bottlenecks
Misuse examples
- Excessive complexity in tests.
- Ignoring defects.
- Focusing on too many scenarios.
Typical traps
- Poor communication within the team.
- Overlooking acceptance criteria.
- Confusion due to technical terminology.
Required skills
Architectural drivers
Constraints
- • Lack of resources.
- • Technical debts.
- • Time pressure.