gridpilot.gg/core/leaderboards/application/use-cases/GetGlobalLeaderboardsUseCase.test.ts

import { describe, it, expect, vi, beforeEach, Mock } from 'vitest';
import { GetGlobalLeaderboardsUseCase, GetGlobalLeaderboardsUseCasePorts } from './GetGlobalLeaderboardsUseCase';
import { LeaderboardsRepository, LeaderboardDriverData, LeaderboardTeamData } from '../ports/LeaderboardsRepository';
import { LeaderboardsEventPublisher } from '../ports/LeaderboardsEventPublisher';

describe('GetGlobalLeaderboardsUseCase', () => {
  let mockLeaderboardsRepository: LeaderboardsRepository;
  let mockEventPublisher: LeaderboardsEventPublisher;
  let ports: GetGlobalLeaderboardsUseCasePorts;
  let useCase: GetGlobalLeaderboardsUseCase;

  const mockDrivers: LeaderboardDriverData[] = [
    { id: 'd1', name: 'Alice', rating: 2000, raceCount: 10 },
    { id: 'd2', name: 'Bob', rating: 1500, raceCount: 5 },
  ];

  const mockTeams: LeaderboardTeamData[] = [
    { id: 't1', name: 'Team A', rating: 2500, memberCount: 5, raceCount: 20 },
    { id: 't2', name: 'Team B', rating: 2200, memberCount: 3, raceCount: 15 },
  ];

  beforeEach(() => {
    mockLeaderboardsRepository = {
      findAllDrivers: vi.fn().mockResolvedValue([...mockDrivers]) as unknown as Mock,
      findAllTeams: vi.fn().mockResolvedValue([...mockTeams]) as unknown as Mock,
      findDriversByTeamId: vi.fn() as unknown as Mock,
    };
    mockEventPublisher = {
      publishGlobalLeaderboardsAccessed: vi.fn().mockResolvedValue(undefined) as unknown as Mock,
      publishLeaderboardsError: vi.fn().mockResolvedValue(undefined) as unknown as Mock,
      publishDriverRankingsAccessed: vi.fn() as unknown as Mock,
      publishTeamRankingsAccessed: vi.fn() as unknown as Mock,
    };
    ports = {
      leaderboardsRepository: mockLeaderboardsRepository,
      eventPublisher: mockEventPublisher,
    };
    useCase = new GetGlobalLeaderboardsUseCase(ports);
  });

  it('should return top drivers and teams', async () => {
    const result = await useCase.execute();

    expect(result.drivers).toHaveLength(2);
    expect(result.drivers[0].name).toBe('Alice');
    expect(result.drivers[1].name).toBe('Bob');

    expect(result.teams).toHaveLength(2);
    expect(result.teams[0].name).toBe('Team A');
    expect(result.teams[1].name).toBe('Team B');

    expect(mockEventPublisher.publishGlobalLeaderboardsAccessed).toHaveBeenCalled();
  });

  it('should respect driver and team limits', async () => {
    const result = await useCase.execute({ driverLimit: 1, teamLimit: 1 });

    expect(result.drivers).toHaveLength(1);
    expect(result.drivers[0].name).toBe('Alice');
    expect(result.teams).toHaveLength(1);
    expect(result.teams[0].name).toBe('Team A');
  });

  it('should handle errors and publish error event', async () => {
    (mockLeaderboardsRepository.findAllDrivers as Mock).mockRejectedValue(new Error('Repo error'));

    await expect(useCase.execute()).rejects.toThrow('Repo error');
    expect(mockEventPublisher.publishLeaderboardsError).toHaveBeenCalled();
  });
});