integration tests

tests/integration/database/errors/error-mapping.integration.test.ts

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+import { describe, it, expect, beforeEach } from 'vitest';
+import { DatabaseTestContext, DriverData } from '../DatabaseTestContext';
+
+describe('Database Constraints - Error Mapping and Reporting', () => {
+  let context: DatabaseTestContext;
+
+  beforeEach(() => {
+    context = DatabaseTestContext.create();
+  });
+
+  it('should provide meaningful error messages for constraint violations', async () => {
+    // Given: A driver exists
+    const driver: DriverData = {
+      id: 'driver-123',
+      iracingId: '12345',
+      name: 'Test Driver',
+      country: 'US',
+      joinedAt: new Date(),
+    };
+    await context.driverRepository.create(driver);
+
+    // And: A team is created
+    await context.createTeamUseCase.execute({
+      name: 'Test Team',
+      tag: 'TT',
+      description: 'Test',
+      ownerId: driver.id,
+      leagues: [],
+    });
+
+    // When: Attempt to create duplicate
+    const result = await context.createTeamUseCase.execute({
+      name: 'Test Team',
+      tag: 'TT',
+      description: 'Duplicate',
+      ownerId: driver.id,
+      leagues: [],
+    });
+
+    // Then: Error should have clear message
+    expect(result.isErr()).toBe(true);
+    if (result.isErr()) {
+      expect(result.error.details.message).toContain('already belongs to a team');
+    }
+  });
+
+  it('should handle repository errors gracefully', async () => {
+    // Given: A driver exists
+    const driver: DriverData = {
+      id: 'driver-123',
+      iracingId: '12345',
+      name: 'Test Driver',
+      country: 'US',
+      joinedAt: new Date(),
+    };
+    await context.driverRepository.create(driver);
+
+    // When: Repository throws an error (simulated by using invalid data)
+    // Note: In real scenario, this would be a database error
+    // For this test, we'll verify the error handling path works
+    const result = await context.createTeamUseCase.execute({
+      name: 'Valid Name',
+      tag: 'TT',
+      description: 'Test',
+      ownerId: 'non-existent',
+      leagues: [],
+    });
+
+    // Then: Should handle validation error
+    expect(result.isErr()).toBe(true);
+  });
+});