Add Public API

tests/rateLimits.test.js

@@ -0,0 +1,20 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { createIpRateLimiter } from '../src/rateLimits.js';
+
+test('limits requests per IP within the configured window', () => {
+  const limiter = createIpRateLimiter({
+    windowMs: 60_000,
+    max: 2,
+    message: 'Too many reads.'
+  });
+
+  assert.equal(limiter.check('203.0.113.8').remaining, 1);
+  assert.equal(limiter.check('203.0.113.8').remaining, 0);
+  assert.equal(limiter.check('203.0.113.9').remaining, 1);
+
+  assert.throws(
+    () => limiter.check('203.0.113.8'),
+    (error) => error.statusCode === 429 && error.message === 'Too many reads.'
+  );
+});