fix core tests

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

@@ -1,6 +1,7 @@
 import { describe, it, expect, beforeEach, vi, Mock } from 'vitest';
 import { JoinLeagueUseCase, type JoinLeagueResult, type JoinLeagueInput, type JoinLeagueErrorCode } from './JoinLeagueUseCase';
 import { ILeagueMembershipRepository } from '../../domain/repositories/ILeagueMembershipRepository';
+import { LeagueMembership } from '../../domain/entities/LeagueMembership';
 import type { Logger, UseCaseOutputPort } from '@core/shared/application';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 
@@ -44,24 +45,16 @@ describe('JoinLeagueUseCase', () => {
     const command: JoinLeagueInput = { leagueId: 'league-1', driverId: 'driver-1' };
 
     membershipRepository.getMembership.mockResolvedValue(null);
-    membershipRepository.saveMembership.mockResolvedValue({
-      id: 'membership-1',
-      leagueId: {
-        value: 'league-1',
-      },
-      driverId: {
-        value: 'driver-1',
-      },
-      role: {
-        value: 'member',
-      },
-      status: {
-        value: 'active',
-      },
-      joinedAt: {
-        value: expect.any(Date),
-      },
-    });
+    membershipRepository.saveMembership.mockResolvedValue(
+      LeagueMembership.create({
+        id: 'membership-1',
+        leagueId: 'league-1',
+        driverId: 'driver-1',
+        role: 'member',
+        status: 'active',
+        joinedAt: new Date(),
+      }),
+    );
 
     const result = await useCase.execute(command);