Report charts remain empty with short test

[oleiade]

Brief summary

I ran a small test with the latest k6 build and noticed that when using the K6_WEB_DASHBOARD_REPORT option if a test doesn't run long enough (that's my assumption?), the report file is successfully created, but the charts appear to be empty:

command:

K6_WEB_DASHBOARD=true K6_WEB_DASHBOARD_EXPORT='report.html' go run go.k6.io/k6 run ../extensions/xk6-dashboard/short-script.js

script:

import http from "k6/http";

export let options = {
  iterations: 100,
};

export default function () {
  http.get("https://test-api.k6.io/");
}

outcome:

k6 version

master

xk6-dashboard version

0.7.2

OS

MacOS

Docker version and image (if applicable)

No response

Steps to reproduce the problem

See Summary

Expected behaviour

Best case scenario for me would be always to have some data in the report, regardless of the duration of the test. But I acknowledge there might be technical limitations to doing that.

Otherwise, I think I would expect either the report file not to be created at all if not enough data is available. Or the report to indicate more explicitly why no data is present in some form (although I think that's not necessarily my preferred option).

Actual behaviour

File is created, but the charts remain empty.

[bubafinder]

Same at me, all short tests are causing empty charts.