How to use doSwitch properly in a scearioBuilder

Question

My scenario builder below does not like the variable ${data} in the doSwitch. Result in error:

Expected type was: (Any, io.gatling.core.structure.ChainBuilder) .doSwitch("${data}")

What is causing the issue?

      val builder: ScenarioBuilder = scenario("Test")
        .repeat(3) {
          pace(10.seconds)
            .feed(new DataFeeder())
            .exec { session =>
              val data = session("data").as[String]
              println(s"data: $data")
              session
            }
            .doSwitch("${data}") {
              // Define cases for different data values
              case "P1" =>
                exec(myFunc(1000000))
              case "P2" =>
                exec(myFunc(2000000))
            }
        }

Answer 1

In the docs of doSwitch you have the following example of code

doSwitch("#{myKey}")( // beware: use parentheses, not curly braces!
  "foo" -> exec(http("name1").get("/foo")),
  "bar" -> exec(http("name2").get("/bar"))
)

where the second parameter is between parentheses ( ) and not curly braces { }. The comment in the code says don't use curly braces.

mean while you are doing this

            .doSwitch("${data}") {
              // Define cases for different data values
              case "P1" =>
                exec(myFunc(1000000))
              case "P2" =>
                exec(myFunc(2000000))
            }

you are using curly braces and then adding case followed by a value, then => (instead of ->) and finally exec(...)

Your should be similar to

            .doSwitch("${data}") (
              // Define cases for different data values
              "P1" -> exec(myFunc(1000000))
              "P2" -> exec(myFunc(2000000))
            )