http://gatling.io
https://github.com/gatling/gatling

http://gatling.io/docs/2.2.1/whats_new/2.2.html
http://gatling.io/#/docs/talks
http://gatling.io/docs/2.2.1/advanced_tutorial.html
http://gatling.io/docs/current/cheat-sheet/

https://github.com/lkishalmi/gradle-gatling-plugin
https://github.com/buhe/gradle-gatling-plugin
https://github.com/alphagov/gradle-gatling-plugin
https://github.com/mraible/21-points/blob/master/gradle/gatling.gradle

http://gatling.io/docs/2.2.1/http/index.html
http://gatling.io/docs/2.2.1/http/http_protocol.html
http://gatling.io/docs/2.2.1/http/http_request.html
http://gatling.io/docs/2.2.1/http/http_check.html

http://gatling.io/docs/2.2.1/general/index.html
http://gatling.io/docs/2.2.1/general/operations.html
http://gatling.io/docs/2.2.1/general/scenario.html
http://gatling.io/docs/2.2.1/session/feeder.html
http://gatling.io/docs/2.2.1/general/assertions.html

articles
2020
https://www.james-willett.com/gatling-vscode/
    https://habr.com/ru/company/otus/blog/509854/
https://www.opsian.com/blog/performance-test-spring-boot-gatling/
????
https://habrahabr.ru/company/tinkoff/blog/344818/
https://habrahabr.ru/company/tinkoff/blog/323316/
http://callistaenterprise.se/blogg/teknik/2014/04/16/a-first-look-at-gatling-a-dsl-based-load-test-tool/

presentations
2017
Ludwikowski - Gatling Distiled
https://www.youtube.com/watch?v=gbDfkk-C4Aw

http://www.slideshare.net/xebia/testworks-conf-performance-testing-made-easy-with-gatling-guillaume-corre

whatsnew
https://gatling.io/2018/09/17/gatling-3-launching-release-candidates/

sbt plugin:
https://github.com/Pravoru/gatling-remote-sbt

http://gatling.io/docs/2.2.1/extensions/sbt_plugin.html
http://gatling.io/docs/2.2.1/migration_guides/2.0-to-2.1.html#sbt-plugin

https://bintray.com/gatling/sbt-plugins/gatling-sbt/view

project/plugins.sbt:
    addSbtPlugin("io.gatling" % "gatling-sbt" % "2.2.0")

build.sbt:
    enablePlugins(GatlingPlugin)

    "io.gatling" % "gatling-sbt" % "2.1.0" for the SBT Plugin
    "io.gatling" % "gatling-test-framework" % "2.1.0" for the testing framework.

    javaOptions in Gatling := overrideDefaultJavaOptions("-Xms1024m", "-Xmx2048m")

In order to not conflict with "standard" tests frameworks, you're now required to prefix your command with gatling:
, e.g. gatling:test instead of test.

sbt
    gatling(-it):copyConfigFiles
    gatling(-it):copyLogbackXml
    gatling(-it):lastReport


samples:

val scn = scenario("Basic login") // scenario name
    .exec(http("Home page").get("/index.html"))

    .exec(http("Login page").get("/login.html")
        .headers(...)
            // asXml, asJSON
            // https://github.com/gatling/gatling/blob/master/gatling-http/src/main/scala/io/gatling/http/request/builder/RequestBuilder.scala
        .basicAuth(username: Expression[String], password: Expression[String]) // can also be on httpProtocol-level
        .queryParam("q", "whatever"))

    .exec(http("Login").post("/login")
        .param("username", "me")
        .param("password", "foo")

        .body(RawFileBody("myFileBody.json")).asJSON // can use fastring templating

        .check(css("#username").is("me"))

    Our own scala code
    .exec((session: Session) => {
        val location = session.getTypedAttribute[String]("location")
        val regex = """([^?]+)?.*""".r
        val regex(stripLocation) = location
        session.setAttribute("stripedParamsLocation", stripLocation)
    })

    .feed(csv("creds.csv"))
    .exec(
        http("request_3")
            .post("/login")
            .param("username", "${username}") // according to the csv header names
            .param("password", "${password}")

    //
    .get(...)
    .check(regex("""<td class="number">ACC(\d+)</td>""")
        .saveAs("account_id"))
    ...
        .get("/account/ACC${account_id}/operations.html")

???
    .pause(100 milliseconds, 1 seconds)
Checks
    check(status.is(200)) // 302 or whatever
    reges/css/xpath/jsonPath
    find/findAll/count
    is/in/not/whatever
Structures
    doIf/repeat/during/asLongAs
    randomSwitch/roundRobinSwitch
Error handling
    tryMax/exitBlockOnFail
Feeders
    csv/tsv/jdbc


sbt-gatling:
http://gatling.io/docs/2.2.1/extensions/sbt_plugin.html

conf:
https://github.com/gatling/gatling/blob/master/gatling-core/src/main/resources/gatling-defaults.conf#L78
http://gatling.io/docs/current/http/http_protocol/#connection-sharing