How can I use the data in config file to get next value when define Feeders

November 22, 2022

I want to get next value by config file which will change by environment.
But I found that when I executed the simualation class, we do not excute karate.config firstly.
So I cannot get the value when define Feeders.

Is there any way to execute karate.config firstly before defining Feeders?

Here is my part of code：
In karate.config define "environment" and "configJsonFile"

var  config = {
    environment: "dev",
}
config.configJsonFile = karate.readAsString('classpath:com/XXX/config-' + config.environment + '.json')

In feader.feature, get the value from karate.config

Feature: get a list of user account

  Scenario: get a list of user account
    * json config = karate.get('configJsonFile')
    * def userAccounts = config.userAccounts

In MockUtil.class

public class MockUtils {

    private static final List<String> userAccounts = (List) Runner.runFeature("classpath:com/XXX/feeder.feature", null, false).get("userAccounts");

    private static final AtomicInteger counter = new AtomicInteger();

    public static String getNextUserAccount() {
        return userAccount = userAccounts.get(counter.getAndIncrement() % userAccounts.size());
    }
}

In simulation.scala:

  System.err.println(MockUtils.getNextUserToken)
  val feeder = Iterator.continually(Map("userAccount" -> MockUtils.getNextUserAccount))
  create = scenario("create").feed(feeder).exec(karateFeature("classpath:XXX/XXX.feature"))

  setUp(
    create.inject(rampUsers(2) during (5 seconds)).protocols(protocol)
  )

When I executed this scala file, it will return error which not get value set in karate.config in file "feader.feature".

I tried to print log in karate.config, but no anything shown in console before execting System.err.println(MockUtils.getNextUserToken) in file "simulation.scala".

If anything is not clear, please tell me. Thanks.

Reference: https://github.com/karatelabs/karate/tree/master/karate-gatling#feeders

Expecting:
I can get the data by config file to set feader.

>Solution :

Even in Gatling, Karate should process the karate-config.js before any Scenario. If it is not happening, you may have some problem with your project structure.

Since your question is very complicated and hard to understand, I think you need to follow this process: https://github.com/karatelabs/karate/wiki/How-to-Submit-an-Issue

Note that if you use the Runner.runFeature() API, you have to set the boolean flag to true to run karate-config.js: https://github.com/karatelabs/karate#invoking-feature-files-using-the-java-api