How to pass in different variables per virtual user for GraphQL query

[astavria4]

I am using EasyGraphQL load tester in conjunction with Artillery to load test my graphql server. Im in the POC stage so I am going against the space x open source graphql server.

this is my index.js file:

'use strict'

const EasyGraphQLLoadTester = require('easygraphql-load-tester') var fs = require('fs') var path = require('path') var schema = fs.readFileSync(path.join(__dirname, 'test', 'missionSchema.graphql'), 'utf8')

const args = { mission: { id: '9D1B7E0' }
}

var loadTester = new EasyGraphQLLoadTester(schema, args)

const options = { selectedQueries: ['mission'], } var testCases = loadTester.artillery(options)

module.exports = { testCases }

This is my config file:

config: target: "http://localhost:8080/v1/graphql" phases:

• duration: 5 arrivalRate: 1 processor: "./index.js" scenarios:
  • name: "GraphQL Query load test" flow:
    • function: "testCases"
    • loop:
      • post: url: "/" json: query: '{{ $loopElement.query }}' variables: '{{ $loopElement.variables }}'
      • log: "----------------------------------"
      • log: "Sent a request to the Query: {{ $loopElement.name }}"
      • log: 'And variables {{ $loopElement.variables }}' over: cases

Is it possible to set up Artillery to have each virtual user created to use a different misionId that is from a list of missionIds?

For example, I have this as my custom arg:

const args = { mission: { id: '9D1B7E0' }
}

Its passing in a hardcoded value as the id and each virtual user created uses this id. If I were to add another mission query to the args with an id of lets say 4. When running the tests, only 4 will be passed for each virtual user. Not 9D1B7E0 and 4.

[hassy]

hi @astavria4 👋 there's a couple of ways: you can generate mission ids on the fly, or load them from a CSV file.

To generate them on the fly, use a beforeRequest hook:

https://artillery.io/docs/guides/guides/http-reference.html#Writing-custom-logic-in-Javascript

There's an example here you can adapt: https://github.com/artilleryio/artillery-examples/tree/main/http-set-custom-header

And to use a CSV file:

https://artillery.io/docs/guides/guides/test-script-reference.html#Payload-Files

And here's an example for using CSVs:

https://github.com/artilleryio/artillery-examples/tree/main/using-data-from-csv