🧑🏽‍🤝‍🧑🏻 ☝🏽 ⚜️ Gatling Load Testing - The Complete Guide. Part 1 👴🏽 👗 ☝🏾

This article is a complete, detailed, and comprehensive guide to effectively using Gatling for load testing. You can also check out my YouTube Gatling video tutorials where I go into more detail on this topic.

A quick overview of the manual

HTTP-, Gatling - ! Gatling. Gatling, .

Gatling? Gatling. :

Gatling - , Scala.

DSL, Gatling, .

(, JMeter), .

Gatling CI-.

?

, , (performance testing).

- , , , .

, . , . (, , ) .

, :

(Load Testing) - ( );

- (Stress Testing) - , « » (breakpoint).

(Soak Testing) - .

Gatling .

, :

(Transaction Response Times) - , .

(Throughput) - , .

(Errors) - , (, -).

Gatling, . Gatling, .

Github.

1. Gatling

- , , JDK8 ( ). , JDK.

Gatling - Gatling Gatling.io. «Download Now», ZIP-:

. bin. :

gatling.bat - Windows

gatling.sh - Mac Unix

Gatling :

0, computerdatabase.BasicSimulation

. (run description), , .

Gatling , Gatling .

2. Gatling Recorder

, , , Gatling, , , .

Gatling ( !), IDE .

, Gatling Recorder (user journey).

2.1 HAR-

Gatling Recorder, , HAR- (Http-) Google Chrome.

Gatling Recorder HTTPS.

HAR-, :

Gatling - , .
Chrome Developer Tools Network.
Clear, , , .
, - , - , . . , Network .
Network «Save all as HAR with content»

. - .

bin Gatling ( Gatling ) recorder.sh

Mac/Unix recorder.bat

Windows. Gatling Recorder.
Recorder Mode HAR Converter

.
HAR File HAR-, 5.
, Class Name , , MyComputerTest

.
Start!
, , , .

, bin Gatling gatling.sh

gatling.bat

. , Gatling , .

, user-files/simulations Gatling. MyComputerTest

, , . - :

import scala.concurrent.duration._

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

class MyComputerTest extends Simulation {

	val httpProtocol = http
		.baseUrl("http://computer-database.gatling.io")
		.inferHtmlResources()
		.userAgentHeader("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36")

	val headers_0 = Map(
		"Accept" -> "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
		"Accept-Encoding" -> "gzip, deflate",
		"Accept-Language" -> "en-GB,en-US;q=0.9,en;q=0.8",
		"Upgrade-Insecure-Requests" -> "1")



	val scn = scenario("MyComputerTest")
		.exec(http("request_0")
			.get("/computers")
			.headers(headers_0))
		.pause(9)
		.exec(http("request_1")
			.get("/computers?f=amstrad")
			.headers(headers_0))
		.pause(4)
		.exec(http("request_2")
			.get("/assets/stylesheets/bootstrap.min.css")
			.resources(http("request_3")
			.get("/assets/stylesheets/main.css")))

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

Gatling. - , , , .

3. Gatling

, , , Gatling ( ), . , , IDE:

3.1 IDE Gatling

Gatling , ( ) IDE. , Scala. Scala JVM, IDE, JVM, .

Eclipse, Java IDE. Eclipse , Gatling Eclipse, .

, () , - Visual Studio Code VS Code. IDE . Gatling VS Code .

, , - IntelliJ IDEA. Scala. Gatling.

, IDE, , :

3.2 Gatling

, Gatling zip- ( ). , - Gatling. . , :

Gradle, . , Gatling Gradle, Gradle Gatling lkishalmi. Gatling Gradle — , .

- Scala Build Tool, SBT. Gatling SBT. SBT Gatling, , .

, , - Maven. Java, , - Maven. Maven Gatling, Maven Gatling, .

IntelliJ Idea Maven .

3.3 Gatling Maven

mvn archetype:generate

, :

Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains):

gatling

.

1: remote -> io.gatling.highcharts:gatling-highcharts-maven-archetype (gatling-highcharts-maven-archetype)

1

Gatling. :

35

, 3.3.1 .

groupId com.gatlingTest

.

artifactId myGatlingTest

.

version ENTER, 1.0-SNAPSHOT

.

package ENTER , com.gatlingTest

.

Y

, , Maven .

, , - IDE. IntelliJ.

IntelliJ Import Project.

, , pom.xml

. open, Intellij IDE .

, , Project Directory src>test>scala. Engine.scala. No Scala SDK in module

. , Setup Scala SDK:

, Scala :

, , Create, 2.12 download:

: Scala 2.12 IntelliJ - 2.13, , Gatling

, Scala IntelliJ, Scala Scala-lang. Download the Scala binaries, :

- ZIP-. IntelliJ, Setup Scala SDK, Configure. Add :

, , lib:

Select the Lib folder to import Scala Binaries

Add Scala Support Scala, :

, scala source root IntelliJ. scala Mark Directory As -> Test Sources Root:

src source root:

, Engine

Run:

There is no simulation script. Please check that your scripts are in user-files/simulations

. , Gatling.

3.4 Gatling

, Gatling. Gatling.

: Gatling- , ... Gatling, , .

scala New > Scala Package - computerdatabase

. New > Scala Class - BasicSimulation

. :

package computerdatabase

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._

class BasicSimulation extends Simulation {

  val httpProtocol = http
    .baseUrl("http://computer-database.gatling.io") //       URL

    .acceptHeader(
      "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
    ) //   
    .acceptEncodingHeader("gzip, deflate")
    .acceptLanguageHeader("en-US,en;q=0.5")
    .userAgentHeader(
      "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:16.0) Gecko/20100101 Firefox/16.0"
    )

  val scn =
    scenario("Scenario Name") //        
      .exec(
        http("request_1")
          .get("/")
      )
      .pause(7) //  ,  Gatling     

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

. Engine Run Engine. Gatling , computerdatabase.BasicSimulation is the only simulation, executing it

. Enter, .

Gatling Maven . mvn gatling:test

. Gatling Maven Gatling.

Gatling ! , . Gatling, API- - !

" " - LoadRunner Virtual User Generator, web-, . web-.

-

Gatling Load Testing - The Complete Guide. Part 1