Approach #2: Behavior-Driven Development (BDD) for User Journey Validation

[ikennaokpala]

Approach #2: Behavior-Driven Development (BDD) for User Journey Validation

Overview

Write executable specifications in natural language (Gherkin). Specifications become tests. Tests become living documentation. Validates complete end-to-end user workflows.

Theory

Feature files are human-readable specifications that execute as automated tests:

Feature: User approves request
  As a service provider
  I want to approve booking requests
  So I can manage my capacity

  Scenario: Approve request with sufficient capacity
    Given I am logged in as a provider
    And I have capacity for 4 items
    And a customer has requested 2 items
    When I navigate to "Pending Requests"
    And I tap "Accept" on the first request
    Then the request status should change to "Accepted"
    And the available capacity should decrease to 2
    And the customer should receive confirmation

Critical User Journeys (Generic Examples)

1. Resource Creation

Given I am a verified provider
When I create an offering from Location A to Location B
And I set available capacity to 4
And I set start time to tomorrow 9 AM
And I publish the offering
Then the offering should appear in search results
And other providers should not see my offering

2. Customer Booking

Given I am a customer
When I search for offerings from Location A to Location B
And I select an offering with 4 available slots
And I request 2 slots
Then the provider should receive a notification
And my booking status should be "pending"
And I should see estimated cost

3. Request Approval/Rejection

Given a customer has requested 2 slots for my offering
When I navigate to pending requests
Then I should see 1 pending request
When I tap "Accept"
Then available capacity should decrease to 2
And the customer should be notified
And payment should be authorized

4. Payment Processing

Given my booking was approved
When the payment is captured
Then I should see transaction confirmation
And the provider's earnings should increase
And I should receive a receipt

5. Service Completion & Rating

Given the service has ended
When I rate the provider 5 stars
And I leave a review "Great service!"
Then the provider should see my rating
And their average rating should update
And I should be able to report issues if needed

Implementation Steps

Week 1: Setup

1. Install BDD testing framework (flutter_gherkin, cucumber, etc.)
2. Create features/ directory structure
3. Write first feature file (resource creation)
4. Implement step definitions
5. Configure test runner (headed mode support)

Week 2: Core Journeys

6. Write Gherkin scenarios for 5 critical journeys
7. Implement all step definitions
8. Add test data fixtures (users, resources, bookings)
9. Run tests in headed mode (visible browser/UI)

Week 3: Discovery & Fixing

10. For each failing scenario:
    • Capture screenshot/video
    • Analyze root cause
    • Create GitHub issue
    • Implement fix
    • Verify scenario passes

Week 4: Integration

11. Add BDD tests to CI pipeline
12. Require passing scenarios before merge
13. Generate HTML reports from test runs
14. Document: scenario → feature mapping

Tools

Dart/Flutter: flutter_gherkin

dev_dependencies:
  flutter_gherkin: ^3.0.0

JavaScript/TypeScript: @cucumber/cucumber

{
  "devDependencies": {
    "@cucumber/cucumber": "^9.0.0"
  }
}

Configuration Example:

FlutterTestConfiguration(
  features: [Glob('features/**.feature')],
  reporters: [
    ProgressReporter(),
    TestRunSummaryReporter(),
    JsonReporter(path: './report.json'),
  ],
  stepDefinitions: [
    GivenIAmLoggedInAs(),
    WhenINavigateTo(),
    ThenIShouldSee(),
  ],
  hooks: [AttachScreenshotOnFailedStepHook()],
);

Success Criteria

✅ 5 critical journeys fully specified in Gherkin
✅ All scenarios have step definitions
✅ Tests run in headed mode (visible execution)
✅ 100% scenario pass rate
✅ Screenshots captured on failures
✅ Living documentation generated from features

Strengths

✅ Business-readable - Non-technical stakeholders understand
✅ Living documentation - Specs stay in sync with code
✅ Collaboration - Shared language between roles
✅ Executable specs - Tests ARE requirements
✅ Regression suite - Scenarios accumulate over time

Weaknesses

❌ Maintenance burden - Brittle step definitions
❌ Slow execution - High-level tests are slower
❌ Over-specification - Too much detail makes fragile
❌ Step duplication - Similar steps across files

Rating

⭐⭐⭐⭐ (4/5) - Excellent for user journeys

References

• Research: .forge/research-spike-alternative-approaches.md (Section 4)
• Agent: QA-02-BDD-Journeys
• Related: Multi-Agent Quality Assurance: Preventing Shallow AI Implementations #4, Approach #1: Property-Based Testing for AI Code Quality #5

Current Status

📋 Approach documented - Ready for implementation

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Labels: enhancement, bdd, user-journeys
Priority: High
Effort: Medium (3-4 weeks)