refactor

core/racing/application/use-cases/GetLeagueStatsUseCase.test.ts

@@ -0,0 +1,96 @@
+import { describe, it, expect, beforeEach, vi, Mock } from 'vitest';
+import { GetLeagueStatsUseCase } from './GetLeagueStatsUseCase';
+import { ILeagueMembershipRepository } from '../../domain/repositories/ILeagueMembershipRepository';
+import { IRaceRepository } from '../../domain/repositories/IRaceRepository';
+import { DriverRatingProvider } from '../ports/DriverRatingProvider';
+
+describe('GetLeagueStatsUseCase', () => {
+  let useCase: GetLeagueStatsUseCase;
+  let leagueMembershipRepository: {
+    getLeagueMembers: Mock;
+  };
+  let raceRepository: {
+    findByLeagueId: Mock;
+  };
+  let driverRatingProvider: {
+    getRatings: Mock;
+  };
+
+  beforeEach(() => {
+    leagueMembershipRepository = {
+      getLeagueMembers: vi.fn(),
+    };
+    raceRepository = {
+      findByLeagueId: vi.fn(),
+    };
+    driverRatingProvider = {
+      getRatings: vi.fn(),
+    };
+    useCase = new GetLeagueStatsUseCase(
+      leagueMembershipRepository as unknown as ILeagueMembershipRepository,
+      raceRepository as unknown as IRaceRepository,
+      driverRatingProvider as unknown as DriverRatingProvider,
+    );
+  });
+
+  it('should return league stats with average rating', async () => {
+    const leagueId = 'league-1';
+    const memberships = [
+      { driverId: 'driver-1' },
+      { driverId: 'driver-2' },
+      { driverId: 'driver-3' },
+    ];
+    const races = [{ id: 'race-1' }, { id: 'race-2' }];
+    const ratings = new Map([
+      ['driver-1', 1500],
+      ['driver-2', 1600],
+      ['driver-3', null],
+    ]);
+
+    leagueMembershipRepository.getLeagueMembers.mockResolvedValue(memberships);
+    raceRepository.findByLeagueId.mockResolvedValue(races);
+    driverRatingProvider.getRatings.mockReturnValue(ratings);
+
+    const result = await useCase.execute({ leagueId });
+
+    expect(result.isOk()).toBe(true);
+    expect(result.unwrap()).toEqual({
+      totalMembers: 3,
+      totalRaces: 2,
+      averageRating: 1550, // (1500 + 1600) / 2
+    });
+  });
+
+  it('should return 0 average rating when no valid ratings', async () => {
+    const leagueId = 'league-1';
+    const memberships = [{ driverId: 'driver-1' }];
+    const races = [{ id: 'race-1' }];
+    const ratings = new Map([['driver-1', null]]);
+
+    leagueMembershipRepository.getLeagueMembers.mockResolvedValue(memberships);
+    raceRepository.findByLeagueId.mockResolvedValue(races);
+    driverRatingProvider.getRatings.mockReturnValue(ratings);
+
+    const result = await useCase.execute({ leagueId });
+
+    expect(result.isOk()).toBe(true);
+    expect(result.unwrap()).toEqual({
+      totalMembers: 1,
+      totalRaces: 1,
+      averageRating: 0,
+    });
+  });
+
+  it('should return error when repository fails', async () => {
+    const leagueId = 'league-1';
+    leagueMembershipRepository.getLeagueMembers.mockRejectedValue(new Error('DB error'));
+
+    const result = await useCase.execute({ leagueId });
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr()).toEqual({
+      code: 'REPOSITORY_ERROR',
+      message: 'Failed to fetch league stats',
+    });
+  });
+});