script.ts

import http from "k6/http";
import { check, sleep } from "k6";

const url = "http://tinyauth.127.0.0.1.sslip.io/api/user/login";
const credentials = {
  username: "user",
  password: "password",
};

export const options = {
  stages: [
    { duration: "5m", target: 50 },
    { duration: "5m", target: 100 },
    { duration: "5m", target: 150 },
    { duration: "5m", target: 200 },
    { duration: "5m", target: 250 },
    { duration: "5m", target: 300 },
  ],
};

export default function () {
  const payload = JSON.stringify(credentials);
  const res = http.post(url, payload);
  check(res, {
    "is status 200": (r) => r.status === 200,
  });
  check(res, {
    "login successful": (r) => r.json("message") === "Login successful",
  });
  sleep(1);
}