Browser synthetics - test button shows "error" when results don't contain any logs

[peterschretlen]

What happened:

When using the test button, the test result will show "there was an error running the test" if the test does not generate any logs

If I add a console.log to the script, the error goes away:

What you expected to happen:

There should be no error

How to reproduce it (as minimally and precisely as possible):

This test (a no-op script) will produce an error

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {

}

This test (adds a console.log) has no error

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  console.log("adding a console log fixes the error");
}

We seem to have an assumption that logs will be returned:

synthetic-monitoring-app/src/components/CheckTestResultsModal.tsx

Lines 106 to 109 in 26d0c5b

	const info = JSON.parse(logsStr);
	let df;
	if (!info.logs) {
	df = buildLogsDf([{ level: 'error', msg: 'There was an error running the test' }]);