NoClassDefFound / NoSuchElementException

Gatling (Open-Source)
1

Hello all,

I have a problem with properly setting up tests with Gatling. I tried to follow what is in quickstart but I keep getting NoSuchElementException being thrown a me
`

class Simple extends Simulation with FlatSpecLike {
val httpConf = http

it should “should just work” in {
val scn = scenario(“just work”).
exec(
http(“basic test”).
get("/")
)

setUp(
scn.inject(atOnceUsers(1))
).protocols(httpConf)
}
}

`

and exception stack is

`

[info] Cause: java.lang.NullPointerException:
[info] at io.gatling.http.config.HttpProtocol$.(HttpProtocol.scala:48)
[info] at io.gatling.http.config.HttpProtocol$.(HttpProtocol.scala)
[info] at io.gatling.http.config.HttpProtocolBuilder$.(HttpProtocolBuilder.scala:38)
[info] at io.gatling.http.config.HttpProtocolBuilder$.(HttpProtocolBuilder.scala)
[info] at io.gatling.http.Predef$.http(Predef.scala:37)
[info] at com.soda.models.prediction.DockerPredictionModelLoadSuite.(DockerPredictionModelLoadSuite.scala:32)
[info] at com.soda.models.prediction.InsultModelLoadSuite.(DockerPredictionModelLoadSuite.scala:47)
[info] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[info] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
[info] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

`

Thank you for all your help

2

No, you never read in the quickstart that you could use Gatling inside ScalaTest specs. And no, that’s not possible.
But Gatling 2.2 will have a very experimental FunSpec. See here for an example.

3

If I try to similiar code from REPL it’s the same.

4

You CAN’T use Gatling in FlatSpecLike!
You CAN’T launch Gatling Simulations directly.

Gatling Simulations are definitions that are built and load by the Gatling engine.