adding monkeytype

backend/__tests__/__testData__/rate-limit.ts

@@ -0,0 +1,30 @@
+import { expect } from "vitest";
+import { REQUEST_MULTIPLIER } from "../../src/middlewares/rate-limit";
+import { MatcherResult, ExpectedRateLimit } from "../vitest";
+import { Test as SuperTest } from "supertest";
+
+export function enableRateLimitExpects(): void {
+  expect.extend({
+    toBeRateLimited: async (
+      received: SuperTest,
+      expected: ExpectedRateLimit,
+    ): Promise<MatcherResult> => {
+      const now = Date.now();
+      const { headers } = await received.expect(200);
+
+      const max =
+        parseInt(headers["x-ratelimit-limit"] as string) / REQUEST_MULTIPLIER;
+      const windowMs =
+        parseInt(headers["x-ratelimit-reset"] as string) * 1000 - now;
+
+      return {
+        pass:
+          max === expected.max && Math.abs(expected.windowMs - windowMs) < 2500,
+        message: () =>
+          "Rate limit max not matching or windowMs is off by more then 2500ms",
+        actual: { max, windowMs },
+        expected: expected,
+      };
+    },
+  });
+}