fix core tests

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

@@ -56,11 +56,14 @@ describe('CreateSponsorUseCase', () => {
     expect(output.present).toHaveBeenCalledTimes(1);
     const presented = (output.present as Mock).mock.calls[0]?.[0];
     expect(presented?.sponsor.id).toBeDefined();
-    expect(presented?.sponsor.name).toBe('Test Sponsor');
-    expect(presented?.sponsor.contactEmail).toBe('test@example.com');
-    expect(presented?.sponsor.websiteUrl).toBe('https://example.com');
-    expect(presented?.sponsor.logoUrl).toBe('https://example.com/logo.png');
-    expect(presented?.sponsor.createdAt).toBeInstanceOf(Date);
+
+    const sponsor = presented!.sponsor;
+    expect(sponsor.name.toString()).toBe('Test Sponsor');
+    expect(sponsor.contactEmail.toString()).toBe('test@example.com');
+    expect(sponsor.websiteUrl?.toString()).toBe('https://example.com');
+    expect(sponsor.logoUrl?.toString()).toBe('https://example.com/logo.png');
+    expect(sponsor.createdAt.toDate()).toBeInstanceOf(Date);
+
     expect(sponsorRepository.create).toHaveBeenCalledTimes(1);
   });