How can I increment a counter in steps of 50?

Question

I have the following code

package lts

import io.gatling.core.Predef._
import io.gatling.http.Predef._

class BankingSimulation extends BaseSimulation {
  val paginateThroughCustomTransactionsView = scenario("Scenario 04: Paginate through custom transactions view")
    .feed(csv("scenario04.csv").circular)
    .exec(http("04_paginateThroughCustomTransactionsView")
      .get("/api/savings/transactions?viewfilter=${viewEncodedkey}&offset=0&limit=50")
      .header("accept", "application/json")
      .check(jsonPath("$..encodedKey").saveAs("myEncodedKey"))
    )
    .asLongAs("${myEncodedKey.exists()}","offsetCounter", exitASAP = false) {
      exec(http("04_paginateThroughCustomTransactionsView")
        .get("/api/savings/transactions?viewfilter=${viewEncodedkey}&offset=${offsetCounter}&limit=50")
        .header("accept", "application/json")
        .check(jsonPath("$..encodedKey").saveAs("myEncodedKey"))
      )
    }


  setUp(
 paginateThroughCustomTransactionsView.inject(incrementConcurrentUsers(1).times(1).eachLevelLasting(1))
  ).protocols(httpProtocol)
}

Right now the scenario works but the offsetCounter is incremented by 1 everytime. How can I increment it by 50?

Answer 1

perhaps a nicer way... don't rely on the loop counter and use a feeder instead

var offsetFeeder = (50 to 1000 by 50).toStream.map(i => Map("offsetCounter" -> i)).toIterator

then inside your .asLongAs block, just

.feed(offsetFeeder)

and execute your "04_paginateThroughCustomTransactionsView" call