add tests to core

core/payments/application/use-cases/index.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it } from 'vitest';
+import * as useCases from './index';
+
+describe('payments use-cases barrel exports', () => {
+  it('re-exports all expected use cases', () => {
+    const exported = useCases as unknown as Record<string, unknown>;
+
+    const expectedExports = [
+      'AwardPrizeUseCase',
+      'CreatePaymentUseCase',
+      'CreatePrizeUseCase',
+      'DeletePrizeUseCase',
+      'GetMembershipFeesUseCase',
+      'GetPaymentsUseCase',
+      'GetPrizesUseCase',
+      'GetSponsorBillingUseCase',
+      'GetWalletUseCase',
+      'ProcessWalletTransactionUseCase',
+      'UpdateMemberPaymentUseCase',
+      'UpdatePaymentStatusUseCase',
+      'UpsertMembershipFeeUseCase',
+    ];
+
+    for (const name of expectedExports) {
+      expect(exported[name], `missing export: ${name}`).toBeDefined();
+    }
+  });
+});