ramda.js not working

[ragnarlonn]

The below, reported by askierniewski@slack, happens when the script further down is run:

ERRO[0009] TypeError: Cannot read property 'find' of undefined========]      700ms / 0s
	at cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js:1:3486(51)
	at e (cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js:1:1069(76))
	at /Users/ragnarlonn/src/go/src/github.com/loadimpact/k6/askierniewski.js:29:24(12)
	at native
	at /Users/ragnarlonn/src/go/src/github.com/loadimpact/k6/askierniewski.js:27:17(32)

The script:

import * as R from "cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"
import {group, sleep, check} from "k6"
import http from "k6/http"

const parseBody = res => {
  let res2 = R.clone(res) // just to be sure that I'm not working on original object
  if (R.is(String(res.body) && !R.isEmpty(res.body) && R.isEmpty(res.error))) {
    try { // Remove try catch block to get "SyntaxError: EOF" on valid JSON
      res.body = JSON.parse(res.body)
    } catch (err) {
      // "SyntaxError: EOF" error is thrown as part of execution teardown
      console.error('JSON.parse ERROR!') // Adding try catch removes SyntaxError but it wont log this line ?!
    }
  }
  return res2
}

export default function() {

  const productId = 1
 
  let res = http.get("https://api.dev.peachworks.com/v1/products")

  const products = parseBody(res).results
  sleep(0.1)

  group("xxx", function() {

    const setup2 = R.find(R.propEq('id', productId), products)
    sleep(0.1)

    group("yyy", function() {

      const setup3 = R.find(R.propEq('id', productId), products)
      sleep(0.1)
    })

  })
}

[liclac]

What precisely happens when you do this, and what did you expect would happen?

[ragnarlonn]

Precisely that error message happens. I have no idea what should happen though :) Looking briefly at the ramda.js docs, it seems R.clone() will make a deep copy of the obj, and then R.find() "returns the first element of the list which matches the predicate". Hmm, a list?

[ppcano]

wrong reply

[ppcano]

Closing it because the problem looks a bug in the parseBody function.

export default function() {

  const productId = 1

  let res = http.get("https://api.dev.peachworks.com/v1/products")

  const products = JSON.parse(res.body).results
  sleep(0.1)


  group("xxx", function() {

    const product = R.find(R.propEq('id', productId), products)
    check(product, {
      "product 1 found": () => product && product.id === productId
    });
    sleep(0.1)

    group("yyy", function() {

      const product2 = R.find(R.propEq('id', productId), products)
      check(product2, {
        "product 2 found": () => product2 && product2.id === productId
      });
      sleep(0.1)
    })

  })
}

Please, open a stackoverflow question for this type of questions.

https://github.com/loadimpact/k6#need-help-or-want-to-contribute

[AdrianSkierniewski]

@liclac @ragnarlonn @ppcano Please don't suggest that clone call it's irrelevant (probably whole ramda) to this issue. Here is a more simplistic version with a different error.

ERRO[0021] SyntaxError: EOF==========================================] -- / --
	at parse (native)
	at /scripts/k6/tests/panera/example.js:26:29(19)

This error is probably related to that ramda issue later and it looks like the root cause of it is related to usage of stages. Errors disappear after removing stages.

import * as R from "cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"
import {group, sleep, check} from "k6"
import http from "k6/http"

export let options = {
  stages: [
    {duration: "20s", target: 5},
    {duration: "10s"},
    {duration: "50s", target: 20},
    {duration: "10s"},
    {duration: "50s", target: 40},
    {duration: "10s"},
    {duration: "50s", target: 60},
    {duration: "100s"},
    {duration: "30s", target: 40},
    {duration: "20s"},
  ]
}

export default function() {

  const productId = 1
  // Get all locations to reuse them in tests
  let res = http.get("https://api.dev.peachworks.com/v1/products")

  const products = JSON.parse(res.body).results
  sleep(0.1)

  group("xxx", function() {

    const setup2 = R.find(R.propEq('id', productId), products)
    sleep(0.1)

    group("yyy", function() {

      const setup3 = R.find(R.propEq('id', productId), products)
      sleep(0.1)
    })

  })
}

Should I create a separate issue for this?

[ppcano]

I reproduced this case in the following gist.

The problem with the above script is that wrong data will be passed to the ramda library when the response fails.

It looks to exist a bug that reports wrongly checks when using stages. This possible bug has confused the issue investigation. I will try to reproduce it again and will create a new issue.