Thresholds, checks - variable name in tag name

Grafana k6
1

Hi,

I wrote a function that accepts tag as parameter (variable “tagValue”) and I want to use it as value in check function. But it does not seem to work. After my test finishes, rate of threshold is 0%. But if I change the varible in tag to string (“Content” in my case), then threshold works ok. Am I doing something wrong or k6 does not support this?

export function checkFieldsExistence(res, fieldToCheck, tagValue) {
  const checkResult = check(res, {
    ['Field check: ' + fieldToCheck]: (r) => r.body.includes(fieldToCheck),
  }, { myTag: tagValue });

  if (!checkResult) {
    fail(
      `Request did not return expected field: ${fieldToCheck} :: ${res.status} ${res.status_text} :: Body: ${res.body}`
    );
  }
}

Threshold definition

thresholds: {
    'checks{myTag:Content}': ['rate>0.9'],
},

Thanks for any advice.