Gatling is a neat tool. You can create your load tests by just coding in scala. Jmeter allows you to do so through a plugin or beanshell but it is not as direct as the way gatling does so.
I will start by adding the gatling plugin
addSbtPlugin("io.gatling" % "gatling-sbt" % "3.0.0")
The next step is to changed the build.sbt
version := "0.1" scalaVersion := "2.12.8" enablePlugins(GatlingPlugin) scalacOptions := Seq( "-encoding", "UTF-8", "-target:jvm-1.8", "-deprecation", "-feature", "-unchecked", "-language:implicitConversions", "-language:postfixOps") libraryDependencies += "io.gatling.highcharts" % "gatling-charts-highcharts" % "3.1.2" % "test,it" libraryDependencies += "io.gatling" % "gatling-test-framework" % "3.1.2" % "test,it"
The above are no different than what you can find on the official site when it comes to sbt commands and gatling.
Our next step is to add a simple http test. Be aware that you should add it in the directories src/test or src/it since, as it is instructed from the sbt dependencies for the binaries to take effect on these directories.
I shall put this test on src/test/scala/com/gkatzioura/BasicSimulation.scala
package com.gkatzioura
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._
class BasicSimulation extends Simulation {
val httpConf = http.baseUrl("http://yourapi.com")
.doNotTrackHeader("1")
val scn = scenario("BasicSimulation")
.exec(http("request_1")
.get("/"))
.pause(5)
setUp(scn.inject(atOnceUsers(1))).protocols(httpConf)
}
Afterwards testing is simple. You go to sbt mode and execute the test.
sbt >gatling:testOnly com.gkatzioura.BasicSimulation >gatling:test
The first command instructs to run just one test, the second one shall run everything.
That’s it! Pretty simple.
Emmanouil Gkatziouras 