chore: init load tests (#7635)

* init load tests

* add machine pat

* setup app

* add introspect

* use xk6-modules repo

* logging

* add teardown

* add manipulate user

* add manipulate user

* remove logs

* convert tests to ts

* add readme

* zitadel

* review comments

load-test/src/oidc.ts

@@ -0,0 +1,74 @@
+import { JSONObject, check, fail } from 'k6';
+import encoding from 'k6/encoding';
+import http from 'k6/http';
+import { Trend } from 'k6/metrics';
+import url from './url';
+
+export class Tokens {
+  idToken?: string;
+  accessToken?: string;
+  info?: any;
+
+  constructor(res: JSONObject) {
+    this.idToken = res.id_token ? res.id_token!.toString() : undefined;
+    this.accessToken = res.access_token ? res.access_token!.toString() : undefined;
+    this.info = this.idToken
+      ? JSON.parse(encoding.b64decode(this.idToken?.split('.')[1].toString(), 'rawstd', 's'))
+      : undefined;
+  }
+}
+
+let oidcConfig: any | undefined;
+
+function configuration() {
+  if (oidcConfig !== undefined) {
+    return oidcConfig;
+  }
+
+  const res = http.get(url('/.well-known/openid-configuration'));
+  check(res, {
+    'openid configuration': (r) => r.status == 200 || fail('unable to load openid configuration'),
+  });
+
+  oidcConfig = res.json();
+  return oidcConfig;
+}
+
+const userinfoTrend = new Trend('oidc_user_info_duration', true);
+export function userinfo(token: string) {
+  const userinfo = http.get(configuration().userinfo_endpoint, {
+    headers: {
+      authorization: 'Bearer ' + token,
+      'Content-Type': 'application/json',
+    },
+  });
+
+  check(userinfo, {
+    'userinfo status ok': (r) => r.status === 200,
+  });
+
+  userinfoTrend.add(userinfo.timings.duration);
+}
+
+const introspectTrend = new Trend('oidc_introspect_duration', true);
+export function introspect(jwt: string, token: string) {
+  const res = http.post(
+    configuration().introspection_endpoint,
+    {
+      client_assertion: jwt,
+      token: token,
+      client_assertion_type: 'urn:ietf:params:oauth:client-assertion-type:jwt-bearer',
+    },
+    {
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+        alg: 'RS256',
+      },
+    },
+  );
+  check(res, {
+    'introspect status ok': (r) => r.status === 200,
+  });
+
+  introspectTrend.add(res.timings.duration);
+}