Gatling AWS Step Function Extension

This is a custom Gatling extension that allows you to perform load testing on AWS Step Functions using the AWS SDK. With this extension, you can start a Step Function execution and wait for it to complete, allowing you to test the performance of your Step Functions under load.

Prerequisites

To use this extension, you'll need the following:

• Java 8 or later
• Gatling 3.0
• AWS SDK

Installation

To use this extension, you can add it as a dependency to your Gatling project. Add the following dependency to your Gatling project's build.gradle:

implementation 'dev.joss:gatling-stepfunction-extension:1.4.0'

For other build tools see the maven central repository overview.

Usage

To use this extension in your Gatling simulation, you can import the dev.joss.gatling.sfn.Predef._ package and use the Sfn DSL to create a new simulation. Here's an example:

import dev.joss.gatling.sfn.Predef._
import dev.joss.gatling.sfn.protocol.SfnProtocol
import io.gatling.core.Predef._
import io.gatling.core.scenario.Simulation

import software.amazon.awssdk.services.sfn.SfnClient

import scala.concurrent.duration.DurationInt
import scala.language.postfixOps

class ExampleSimulation extends Simulation {
  var sfnClient: SfnClient = SfnClient.builder().build()
  var sfnArn =
    "arn:aws:states:eu-west-1:000000000000:stateMachine:some-arn"

  val scn = scenario("SFN DSL test")
    .exec(
      sfn("Start Hello World Execution").startExecution
        .arn(sfnArn)
        .payload("{}")
    )
    .pause(5000.milliseconds)
    .exec(sfn("Check the response").checkSucceeded)

  val requests = scn.inject {
    constantUsersPerSec(100) during (5 minutes)
  }
  setUp(requests).protocols(SfnProtocol(sfnClient))

}

This example creates a new Gatling scenario that starts an execution, waits 5 seconds and then checks the step function has succeeded. For a more applied example, see the example project which tests AWS's Hello World step function using localstack.

License

This extension is licensed under the MIT License. See the LICENSE file for details.