Postman requests take into account K6 param options

[thim81]

This is a PR to provide support in the Postman request for passing K6 params that are globally defined.

https://k6.io/docs/javascript-api/k6-http/params

Example

export default function () {
  let params = {
    cookies: { my_cookie: 'value' },
    headers: { 'X-MyHeader': 'k6test' },
    redirects: 5,
    tags: { k6test: 'yes' },
  };
  let res = http.get('https://k6.io', params);
}

It seemed that the Postman request function does not uses all the "options", when executing the http.request via K6.

Example script.js file

// Auto-generated by the Load Impact converter

import "./libs/shim/core.js";
import { group } from "k6";
import "./requests/Lists/Get-all-list-configurations.js";

export let options = { maxRedirects: 4 , headers: { 'Content-Type': 'application/json' } };

const Request = Symbol.for("request");
postman[Symbol.for("initial")]({
  options,
  collection: {
    baseUrl: "https://example.com/api"
  },
  environment: {
    baseUrl: "https://example.com/api"
  }
});

...

Which results in the following K6 call

INFO[0006] Request:
GET /api/lists/v2?$top=100&$skip=0&$count=false HTTP/1.1
User-Agent: k6/0.29.0 (https://k6.io/)
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip

The PR adds the passing of let options configurations, when making the K6 requests.

export let options = { maxRedirects: 4 , headers: { 'Content-Type': 'application/json' } };

Which results in

INFO[0006] Request:
GET /api/lists/v2?$top=100&$skip=0&$count=false HTTP/1.1
User-Agent: k6/0.29.0 (https://k6.io/)
Content-Type: application/json
Accept-Encoding: gzip

This PR would allow the possibility to leverage any K6 Params https://k6.io/docs/javascript-api/k6-http/params to be used when executing the Postman Request via K6.

[simskij]

I need to test this before merging, but from eyeing it this looks great. Good job, @thim81! 👏🏼

[simskij]

Thanks a bunch for your contribution! 🎉