gridpilot.gg/tests/integration/leaderboards/README.md

Leaderboards Integration Tests

This directory contains integration test placeholders for the leaderboards functionality in GridPilot, following the Clean Integration Testing strategy.

Test Coverage

1. Global Leaderboards Use Cases (global-leaderboards-use-cases.integration.test.ts)

Tests the orchestration logic for the main leaderboards page use cases:

• Use Case: GetGlobalLeaderboardsUseCase
• Purpose: Retrieves top drivers and teams for the global leaderboards page
• Focus: Verifies Use Case orchestration with In-Memory adapters

Key Scenarios:

• ✅ Retrieve top drivers and teams with complete data
• ✅ Handle minimal data scenarios
• ✅ Limit results to top 10 drivers and teams
• ✅ Handle empty states (no drivers, no teams, no data)
• ✅ Handle duplicate ratings with consistent ordering
• ✅ Verify data accuracy and ranking consistency
• ✅ Error handling for repository failures

2. Driver Rankings Use Cases (driver-rankings-use-cases.integration.test.ts)

Tests the orchestration logic for the detailed driver rankings page:

• Use Case: GetDriverRankingsUseCase
• Purpose: Retrieves comprehensive list of all drivers with search, filter, and sort capabilities
• Focus: Verifies Use Case orchestration with In-Memory adapters

Key Scenarios:

• ✅ Retrieve all drivers with complete data
• ✅ Pagination with various page sizes
• ✅ Search functionality (by name, partial match, case-insensitive)
• ✅ Filter functionality (by rating range, team affiliation)
• ✅ Sort functionality (by rating, name, rank, race count)
• ✅ Combined search, filter, and sort operations
• ✅ Empty states and edge cases
• ✅ Error handling for repository failures

3. Team Rankings Use Cases (team-rankings-use-cases.integration.test.ts)

Tests the orchestration logic for the detailed team rankings page:

• Use Case: GetTeamRankingsUseCase
• Purpose: Retrieves comprehensive list of all teams with search, filter, and sort capabilities
• Focus: Verifies Use Case orchestration with In-Memory adapters

Key Scenarios:

• ✅ Retrieve all teams with complete data
• ✅ Pagination with various page sizes
• ✅ Search functionality (by name, partial match, case-insensitive)
• ✅ Filter functionality (by rating range, member count)
• ✅ Sort functionality (by rating, name, rank, member count)
• ✅ Combined search, filter, and sort operations
• ✅ Member count aggregation from drivers
• ✅ Empty states and edge cases
• ✅ Error handling for repository failures

Test Structure

Each test file follows the same pattern:

describe('Use Case Orchestration', () => {
  let repositories: InMemoryAdapters;
  let useCase: UseCase;
  let eventPublisher: InMemoryEventPublisher;

  beforeAll(() => {
    // Initialize In-Memory adapters
  });

  beforeEach(() => {
    // Clear repositories before each test
  });

  describe('Success Path', () => {
    // Tests for successful operations
  });

  describe('Search/Filter/Sort Functionality', () => {
    // Tests for query operations
  });

  describe('Edge Cases', () => {
    // Tests for boundary conditions
  });

  describe('Error Handling', () => {
    // Tests for error scenarios
  });

  describe('Data Orchestration', () => {
    // Tests for business logic verification
  });
});

Testing Philosophy

These tests follow the Clean Integration Testing strategy:

What They Test

• Use Case Orchestration: How Use Cases interact with their Ports (Repositories, Event Publishers)
• Business Logic: The core logic of ranking, filtering, and sorting
• Data Flow: How data moves through the Use Case layer
• Event Emission: Whether proper events are published

What They DON'T Test

• ❌ UI rendering or visual implementation
• ❌ Database persistence (use In-Memory adapters)
• ❌ API endpoints or HTTP contracts
• ❌ Real external services
• ❌ Performance benchmarks

In-Memory Adapters

All tests use In-Memory adapters for:

• Speed: Tests run in milliseconds
• Determinism: No external state or network issues
• Focus: Tests orchestration, not infrastructure

Running Tests

# Run all leaderboards integration tests
npx vitest run tests/integration/leaderboards/

# Run specific test file
npx vitest run tests/integration/leaderboards/global-leaderboards-use-cases.integration.test.ts

# Run with UI
npx vitest ui tests/integration/leaderboards/

# Run in watch mode
npx vitest watch tests/integration/leaderboards/

Implementation Notes

TODO Comments

Each test file contains TODO comments indicating what needs to be implemented:

1. Setup: Initialize In-Memory repositories and event publisher
2. Clear: Clear repositories before each test
3. Test Logic: Implement the actual test scenarios

Test Data Requirements

When implementing these tests, you'll need to create test data for:

• Drivers with various ratings, names, and team affiliations
• Teams with various ratings and member counts
• Race results for statistics calculation
• Career history for profile completeness

Expected Use Cases

These tests expect the following Use Cases to exist:

• GetGlobalLeaderboardsUseCase
• GetDriverRankingsUseCase
• GetTeamRankingsUseCase

And the following Ports:

• GlobalLeaderboardsQuery
• DriverRankingsQuery
• TeamRankingsQuery

Expected Adapters

These tests expect the following In-Memory adapters:

• InMemoryDriverRepository
• InMemoryTeamRepository
• InMemoryEventPublisher

Related Files

• plans/clean_integration_strategy.md - Clean Integration Testing philosophy
• tests/e2e/bdd/leaderboards/ - BDD E2E tests for user outcomes
• tests/integration/drivers/ - Example integration tests for driver functionality

Next Steps

1. Implement In-Memory Adapters: Create the In-Memory versions of repositories and event publisher
2. Create Use Cases: Implement the Use Cases that these tests validate
3. Define Ports: Define the Query and Port interfaces
4. Implement Test Logic: Replace TODO comments with actual test implementations
5. Run Tests: Verify all tests pass and provide meaningful feedback