How to pass K6 Tool data modified in default function to teardown stage

Question

K6 Tool is being used for our testing needs. For the sample snippet below when run with K6, we see that the change occurred in default function for data passed from setup is not affected and visible in tear down stage. Is there any other possible way to have this available so that we could utilize it for Test Data Management purposes during Load Tests?

import http from "k6/http";
import { group, check, sleep, fail } from "k6";
import papaparse from 'https://jslib.k6.io/papaparse/5.1.1/index.js';
import { textSummary } from "https://jslib.k6.io/k6-summary/0.0.1/index.js";

const SLEEP_DURATION = 1;
// Global variables should be initialized.

var csvData =  [{"Id":"P976O6RP8NSFN076RKLBSGK1Q8NZT7WA"},{"Id":"D4YJZFQJUPJTZWPLP2VB5M839SZBNNSO"}];

function removeId(arr, value) {
    arr = arr.filter(function(item) {
      return item.Id !== value
    });
    return arr;
}

export function setup() {
  return JSON.parse(JSON.stringify(csvData));
}

export default function(data) {   
    let Id = csvData[0].Id;
    data = removeId(data, Id);
    console.log('ID deleted is: '+Id+' \nJson<data> in default  :: '+JSON.stringify(data));
}

export function handleSummary(data) {
    return {
        //stdout: JSON.stringify(data),
    };
}

export function teardown(data) {
    //Teardown does not have modified data object updated in default function
    console.log('\nJson<data> in teardown :: '+JSON.stringify(data));
}

score 0 · Answer 1 · answered Oct 28 '21 at 18:44

No, this is (currently?) not possible. The setup data must not be modified by the default function. Think about it: this wouldn't work, if executed in a cloud or clustered environment, because the setup and default function might be executed on different machines.

Why do you want to modify the setup data?

How to pass K6 Tool data modified in default function to teardown stage

1 Answers1