spike script

k6/spike.js

@@ -0,0 +1,49 @@
+import { check, sleep } from 'k6';
+import exec from 'k6/execution';
+import http from 'k6/http';
+
+export const options = {
+	 // Key configurations for spike in this section
+     stages: [
+        { duration: '2m', target: 2000 }, // fast ramp-up to a high point
+        { duration: '1m', target: 0 }, // quick ramp-down to 0 users
+      ],
+};
+
+const baseUrl = 'http://localhost:3001';
+const cookieName = 'prompt-injection.sid';
+const vuCookieJar = (() => {
+	const cookieJars = {};
+	return {
+		get: (id) => cookieJars[id],
+		set: (id, jar) => (cookieJars[id] = jar),
+	};
+})();
+
+export default () => {
+	// Use same jar for every iteration of same VU! k6 doesn't do this for us :(
+	const vuID = exec.vu.idInTest;
+	let jar = vuCookieJar.get(vuID);
+	if (!jar) {
+		jar = http.cookieJar();
+		vuCookieJar.set(vuID, jar);
+	}
+	let originalCookie = (jar.cookiesForURL(baseUrl)[cookieName] || [])[0];
+
+	const data = { infoMessage: 'Hi', chatMessageType: 'LEVEL_INFO', level: 3 };
+	const response = http.post(`${baseUrl}/test/load`, JSON.stringify(data), {
+		headers: { 'Content-Type': 'application/json' },
+		jar,
+	});
+	// Expecting cookie to match original, OR first-time be added to the jar
+	const expectedCookie =
+		originalCookie || jar.cookiesForURL(baseUrl)[cookieName][0];
+	check(response, {
+		'response code was 200': (response) => response.status === 200,
+		'cookie was preserved': (response) =>
+			response.cookies[cookieName].length === 1 &&
+			response.cookies[cookieName][0].value === expectedCookie,
+	});
+
+	sleep(1);
+};