This document provides an overview of Gatling, an open source load testing tool. It discusses using Gatling to simulate virtual users and requests through scenarios. It describes defining scenarios using the Gatling DSL to make HTTP requests and add pauses. It also covers using feeders to parameterize requests, defining checks to validate responses, and assertions to validate performance metrics.

1. Xtreme Testing
Gatling

2. Virtual User

3. Request protocol

4. Request Protocol
scenario("Standard User")
.exec(http("Access Github").get("https://github.com"))
.pause(2, 3)
.exec(http("Search for
'gatling'").get("https://github.com/search?q=gatling"))
.pause(2)

5. Scenario

6. Scenario
scenario("Standard User")
.exec(http("Access Github").get("https://github.com"))
.pause(2, 3)
.exec(http("Search for
'gatling'").get("https://github.com/search?q=gatling"))
.pause(2)

7. Simulation

8. Simulation
val stdUser = scenario("Standard User")
setUp(
stdUser.inject(atOnceUsers(2000)),
stdUser.inject(nothingFor(60 seconds), rampUsers(5) over
(400 seconds)),
stdUser.inject(rampUsers(500) over (200 seconds)))

9. Session

10. Feeders

11. Feeders
■ CSV feeder
■ JSON feeder
■ JDBC feeder
■ Sitemap feeder
■ Redis feeder

12. Feeder
val feeder = csv("foo.csv").random
val scn1 = scenario("LoginSimulation").feed(feeder)
http("loginmultiuser")
.post("/login")
.headers(headers_0)
.formParam("email", "${username}")
.formParam("password", "${password}")
.check(substring("${displayname}").exists)

13. Feeder
val feeder = csv("foo.csv").random
.queue // default behavior: use an Iterator on the underlying sequence
.random // randomly pick an entry in the sequence
.shuffle // shuffle entries, then behave live queue
.circular // go back to the top of the sequence once the end is reached

14. Checks

15. Checks
■ Defining the check type
■ Extracting
■ Transforming
■ Validating
■ Saving
http("My Request").get("myUrl").check(status.is(200))
http("loginoneuser") .post("/login").headers(headers_0).formParam("email",
username).formParam("password", password)
.check(headerRegex("Set-Cookie", "XSRF-TOKEN=(.*)").saveAs("xsrf_token"))

16. Assertions

17. Assertions
// Assert that the max response time of all requests is less than 100 ms
setUp(scn).assertions(global.responseTime.max.lt(100))
// Assert that every request has no more than 5% of failing requests
setUp(scn).assertions(forAll.failedRequests.percent.lte(5))
// Assert that the percentage of failed requests named "Index" in the group "Search"
// is exactly 0 %
setUp(scn).assertions(details("Search" / "Index").failedRequests.percent.is(0))
// Assert that the rate of requests per seconds for the group "Search"
setUp(scn).assertions(details("Search").requestsPerSec.between(100, 1000))

18. References
■ https://gatling.io/documentation/

19. Thank You
For questions or suggestions
mailto: xt-hyderabad@thoughtworks.com
nalinim@thoughtworks.com
Xtreme Testing