first commit

tests/unit/notification.controller.test.js

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+const notificationService = require('../../app/modules/notification/services/notification.service');
+const responseHelper = require('../../app/helpers/response.helper');
+
+jest.mock('../../app/modules/notification/services/notification.service');
+jest.mock('../../app/helpers/response.helper');
+
+const NotificationController = require('../../app/modules/notification/controllers/notification.controller');
+
+describe('NotificationController', () => {
+    let mockReq, mockRes;
+
+    beforeEach(() => {
+        jest.clearAllMocks();
+        mockRes = {
+            status: jest.fn().mockReturnThis(),
+            json: jest.fn().mockReturnThis()
+        };
+    });
+
+    it('should handle notification successfully', async () => {
+        mockReq = {
+            body: { order_id: 'I-123', transaction_status: 'settlement' }
+        };
+
+        notificationService.verifySignature.mockReturnValue(true);
+        notificationService.processNotification.mockResolvedValue();
+
+        await NotificationController.handle(mockReq, mockRes);
+
+        expect(notificationService.verifySignature).toHaveBeenCalledWith(mockReq.body);
+        expect(notificationService.processNotification).toHaveBeenCalledWith(mockReq.body);
+        expect(responseHelper.success).toHaveBeenCalledWith(mockRes, expect.stringContaining('Handled'));
+    });
+
+    it('should return 403 if signature invalid', async () => {
+        mockReq = { body: { signature_key: 'invalid' } };
+        notificationService.verifySignature.mockReturnValue(false);
+
+        await NotificationController.handle(mockReq, mockRes);
+
+        expect(responseHelper.error).toHaveBeenCalledWith(mockRes, expect.stringContaining('Invalid Signature'), 403);
+    });
+
+    it('should return error on service error', async () => {
+        mockReq = { body: { order_id: 'I-123' } };
+        notificationService.verifySignature.mockReturnValue(true);
+        notificationService.processNotification.mockRejectedValue(new Error('DB Error'));
+
+        await NotificationController.handle(mockReq, mockRes);
+
+        expect(responseHelper.error).toHaveBeenCalledWith(mockRes, expect.stringContaining('DB Error'));
+    });
+});