Gatling Workshop

Performance test using Gatling

Preparation

Download Zip bundle

1. http://gatling.io/#/resources/download

Workshop Steps

Scenario

编写脚本,在"stackoverflow"网站上实现如下操作:
- 进入首页
- 搜索"gatling",并进入一条搜索结果
- 在结果列表进行翻页操作
- 进入"Documentation",根据输入的tag,进入指定主题页面

Section 1

1. 访问"stackoverflow" homepage
2. 定义用户注入方式 - rampUsers(nbUsers) over(duration)

Refer to

• http://gatling.io/docs/2.2.2/general/simulation_structure.html#headers-definition
• http://gatling.io/docs/2.0.0-RC2/http/http_request.html#common-parameters
• http://gatling.io/docs/2.0.0-RC2/general/simulation_setup.html#injection

Example

 val headers_0 = Map(
     "Accept" -> "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
     "Upgrade-Insecure-Requests" -> "1")
     
 val scn = scenario("homepageDemo")
    //Home
    .exec(http("homepage")
    .get("/")
    .headers(headers_0)
  )
  
  setUp(scn.inject(rampUsers(5) over (5 seconds))).protocols(httpProtocol)

Practice

仿照上述例子,自己编写对github网站的访问

Section 2-1

1. 将三个scenario封装成object
2. 定义三类虚拟用户进行不同操作:userA-search&browse,userB-documentation,userC-search&browse&documentation
3. 使用三种方法丰富用户注入
   • userA: rampUsers(nbUsers) over(duration)
   • userB: atOnceUsers(nbUsers)
   • userC: constantUsersPerSec(rate) during(duration)

Refer to

http://gatling.io/docs/2.0.0-RC2/advanced_tutorial.html#step-01-isolate-processes

Example

//Search
object Search {
    val search =
      exec(http("Home")
        .get("/")
        .headers(headers_0))
        .pause(1)
        .exec(http("Search")
          .get("/search")
          .headers(headers_0)
          .queryParam("q", "gatling"))
        .pause(1)
        .exec(http("Select")
          .get("/questions/22563517/using-gatling-as-an-integration-test-tool")
          .headers(headers_0)
          .queryParam("s", "1|3.1596"))
        .pause(1)
  }
  
  //Browse
  object Browse {
     
     val browse =
        exec(http("Page 2")
           .get("/search")
           .headers(headers_0)
           .queryParam("page", "2")
           .queryParam("tab", "relevance")
           .queryParam("q", "gatling")
        )
        .pause(2)
        .exec(http("Page 3")
           .get("/search")
           .headers(headers_0)
           .queryParam("page", "3")
           .queryParam("tab", "relevance")
           .queryParam("q", "gatling")
        )
    }
    
    //Documentation
    object Documentations {
    
        val documentation =
          exec(http("Documentation")
            .get("/documentation")
            .headers(headers_0))
            .pause(1)
            .exec(http("Tag")
              .post("/documentation/filter/submit")
              .headers(headers_1)
              .formParam("filter", "CSS")
              .formParam("fkey", "f757bad658420c9ff22bd7a93654132c")
              .formParam("tab", "popular")
            )
            .pause(1)
            .exec(http("Topics")
              .get("/documentation/css/topics")
              .headers(headers_0))
      }
      
    val userA = scenario("searchChannel").exec(Search.search, Browse.browse)
    val userB = scenario("documentationsChannel").exec(Documentations.documentation)
    val userC = scenario("allChannel").exec(Search.search, Browse.browse, Documentations.documentation)
    
    setUp(
        userA.inject(rampUsers(5) over (5 seconds)),
        userB.inject(atOnceUsers(10)),
        userC.inject(constantUsersPerSec(5) during (2 seconds))
      ).protocols(httpProtocol)

Section 2-2

1. 使用feeder中的csv动态传递参数,传入搜索关键字"gatling"
2. 使用check抓取并保存进入Documentation主题页面的URL,检查请求状态为200
3. 访问保存的URL进入指定页面

Refer to

• http://gatling.io/docs/2.0.0-RC2/advanced_tutorial.html#step-03-use-dynamic-data-with-feeders-and-checks
• http://gatling.io/docs/2.0.0-RC2/session/feeder.html#feeder
• http://gatling.io/docs/2.0.0-RC2/http/http_check.html#http-response-body
• http://gatling.io/docs/2.0.0-RC2/http/http_check.html#saving

Example

val feeder = csv("keyWords.csv").circular
//Search
object Search {
    val search =
      exec(http("Home")
        .get("/")
        .headers(headers_0))
        .pause(1)
        .feed(feeder)
        .exec(http("Search")
          .get("/search")
          .headers(headers_0)
          .queryParam("q", "${searchCriterion}")
        )
        .pause(1)
        .exec(http("Select")
          .get("/questions/22563517/using-gatling-as-an-integration-test-tool")
          .headers(headers_0)
          .queryParam("s", "1|3.1596"))
        .pause(1)
  }
  
  //Browse
  object Browse {
     
     val browse =
        exec(http("Page 2")
               .get("/search")
               .headers(headers_0)
               .queryParam("page", "2")
               .queryParam("tab", "relevance")
               .queryParam("q", "gatling")
             )
             .pause(2)
             .exec(http("Page 3")
               .get("/search")
               .headers(headers_0)
               .queryParam("page", "3")
               .queryParam("tab", "relevance")
               .queryParam("q", "gatling")
             )
    }
    
    //Documentation
    object Documentations {
    
        val documentation =
          exec(http("Documentation")
            .get("/documentation")
            .headers(headers_0))
            .pause(1)
            .exec(http("Tag")
              .post("/documentation/filter/submit")
              .headers(headers_1)
              .formParam("filter", "CSS")
              .formParam("fkey", "f757bad658420c9ff22bd7a93654132c")
              .formParam("tab", "popular")
              .check(css("a:contains('CSS')", "href").saveAs("topicsURL"))
              .check(status.is(200)))
            .pause(1)
            .exec(http("Topics")
              .get("${topicsURL}")
              .headers(headers_0))
      }

Homework :)

1. 使用repeat简化翻页

Refer to

• http://gatling.io/docs/2.0.0-RC2/general/scenario.html#repeat