bdd-scenarios
Use when writing effective BDD scenarios including acceptance criteria, edge cases, and scenario organization. Use when defining behavior specifications.
What this skill does
# BDD Scenarios
Learn to write clear, maintainable BDD scenarios that effectively capture business requirements and drive implementation.
## Writing Good Scenarios
A good scenario should be:
- **Specific**: Test one behavior
- **Declarative**: Describe what, not how
- **Business-focused**: Use domain language
- **Independent**: No dependencies on other scenarios
```gherkin
# Good scenario - specific and declarative
Scenario: Customer receives loyalty discount
Given a customer with Gold membership status
And a cart total of $100
When the customer proceeds to checkout
Then a 10% loyalty discount should be applied
And the final total should be $90
# Bad scenario - too implementation-focused
Scenario: Apply discount
Given I click the membership dropdown
And I select "Gold" from the list
When I click the checkout button
Then the JavaScript calculates 10% off
```
## Acceptance Criteria Format
```gherkin
Feature: Order Refunds
# Rule-based acceptance criteria
Rule: Full refunds are available within 30 days
Scenario: Refund requested within return window
Given an order placed 15 days ago
When the customer requests a refund
Then a full refund should be processed
Scenario: Refund requested after return window
Given an order placed 45 days ago
When the customer requests a refund
Then the refund should be denied
And the customer should see "Return window expired"
```
## Edge Case Scenarios
```gherkin
Feature: User Registration
Scenario: Successful registration
Given I am on the registration page
When I submit valid registration details
Then my account should be created
# Edge cases
Scenario: Registration with existing email
Given a user exists with email "[email protected]"
When I try to register with email "[email protected]"
Then I should see "Email already registered"
Scenario: Registration with invalid email format
When I try to register with email "not-an-email"
Then I should see "Please enter a valid email"
Scenario: Registration with empty required fields
When I submit the registration form with empty fields
Then I should see validation errors for required fields
```
## Scenario Tags and Organization
```gherkin
@authentication @critical
Feature: User Login
@smoke
Scenario: Basic login flow
# ...
@security
Scenario: Account lockout after failed attempts
# ...
@wip
Scenario: Two-factor authentication
# Work in progress
```
## When to Use This Skill
Use bdd-scenarios when you need to:
- Define acceptance criteria for user stories
- Document expected system behavior
- Create comprehensive test coverage
- Identify edge cases early in development
- Communicate requirements clearly
## Best Practices
- Start with the happy path scenario
- Add edge cases systematically
- Use tags for organization and filtering
- Keep scenarios at 3-7 steps
- Write scenarios before implementation
- Review scenarios with stakeholders
## Common Pitfalls
- Writing scenarios after implementation
- Including too many steps per scenario
- Using vague or ambiguous language
- Forgetting negative test cases
- Not organizing with tags effectively
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