Code for Run performance test with k6 on medium

Run-performance-test-with-k6-examples.js

// Example of http get
// 1_http_get.js
import http from 'k6/http';
import { sleep } from 'k6';

export default function() {
    http.get('http://test.k6.io');
    sleep(1);
}


// Example of http get
// 2_http_post.js
import http from 'k6/http';

export default function () {
    var url = 'http://test.k6.io/login';
    var payload = JSON.stringify({
        email: 'aaa',
        password: 'bbb',
    });

    var params = {
        headers: {
            'Content-Type': 'application/json',
        },
    };

    http.post(url, payload, params);
}


// Example of check
// 
// Checks are like asserts but differ in that they don't halt the execution, 
// instead, they just store the result of the check, pass or fail, 
// and let the script execution continue.
// Ref. https://k6.io/docs/using-k6/checks
//
// 3_http_check.js
import { check } from 'k6';
import http from 'k6/http';

export default function () {
    let res = http.get('http://test.k6.io/');
    check(res, {
        'is status 500': (r) => r.status === 500,
    });
}



// Example of threshold
// Thresholds are a pass/fail criteria used to specify the performance expectations of 
// the system under test.
// Ref. https://k6.io/docs/using-k6/thresholds
// 4_http_threadshold.js
import http from 'k6/http';
import { Rate } from 'k6/metrics';

const myFailRate = new Rate('failed requests');

export let options = {
  thresholds: {
    'failed requests': ['rate<0.1'], // threshold on a custom metric
    http_req_duration: ['p(95)<500'], // threshold on a standard metric
  },
};

export default function () {
  let res = http.get('https://test-api.k6.io/public/crocodiles/1/');
  myFailRate.add(res.status !== 200);
}


// Example of option
// Options allow you to configure how k6 will behave during test execution.
// Ref. https://k6.io/docs/using-k6/options
// 5_http_options.js
import http from 'k6/http';
import { sleep } from 'k6';

export let options = {
    vus: 10,
    iterations: 100,
};

export default function() {
    http.get('http://test.k6.io');
    sleep(1);
}