Test express-rate-limit implementation

[koddi-volenday]

Hi all,

I have this test case to test my implementation for api rate limiting using express-rate-limit library

`import request from 'supertest';
import express, { Request, Response, NextFunction } from 'express';
import * as envdata from './models/config';
import { rateLimiter } from './utils';

const { RATE_LIMITER_WINDOWS_MS } = envdata.default;
const RATE_LIMITER_MAX = 3;

describe('Rate Limiting Middleware', () => {
let app: express.Application;

// Use beforeEach to create a fresh app instance for each test
beforeEach(() => {
	app = express();

	// THIS IS THE KEY FIX: tell Express to trust proxy headers
	app.set('trust proxy', true);

	app.get(
		'/',
		rateLimiter(RATE_LIMITER_WINDOWS_MS, RATE_LIMITER_MAX),
		(_req: Request, res: Response, _next: NextFunction) => {
			res.status(200).send('Success');
		}
	);
});

it('should allow requests under the limit', async () => {
	for (let i = 0; i < RATE_LIMITER_MAX; i++) {
		const res = await request(app).get('/');
		expect(res.status).toBe(200);
	}
});

it('should block requests over the limit', async () => {
	// Send a series of requests from a specific IP to consume the limit
	for (let i = 0; i < RATE_LIMITER_MAX; i++) {
		await request(app).get('/');
	}

	// The next request should be blocked
	const blockedRes = await request(app).get('/');
	expect(blockedRes.status).toBe(429);
});

});
`

The first test is successful. but the second one fails. Do you know whats wrong on this test case? Thanks