Gatling Rest API 测试 - 从 json 响应中检索一个值并将其添加到列表中,遍历列表

Gatling Rest API Testing - retrieve a value from json response and add it to the list, iterate through list

我是 Gatling 的新手,我正在尝试对几个 rest 调用进行性能测试。在我的场景中,我需要从第一次调用的 json 响应中提取一个值,并在循环几次后将这些值添加到列表中。再次循环几次并将值添加到列表中后,我想通过迭代列表中的值在下一次 rest 调用中重用每个值。任何人都可以建议如何实现这一点。我试过如下,

    var datasetIdList = List.empty[String]
    val datasetidsFeeder = datasetIdList.map(datasetId => Map("datasetId" -> datasetId)).iterator
    
    def createData() = {
      repeat(20){
      feed("").exec(http("create dataset").post("/create/data").header("content-type", "application/json")
            .body(StringBody("""{"name":"name"}"""))
            .asJson.check(jsonPath("$.id").saveAs("userId"))))
.exec(session => { var usrid = session("userId").as[String].trim
          datasetIdList:+= usrid session})
    }}
    def upload()= feed(datasetidsFeeder).exec(http("file upload").post("/compute-metaservice/datasets/${datasetId}/uploadFile")
            .formUpload("File","./src/test/resources/data/File.csv")
            .header("content-type","multipart/form-data")
            .check(status is 200))
  
    val scn = scenario("create data and upload").exec(createData()).exec(upload())
    setUp(scn.inject(atOnceUsers(1))).protocols(httpConf)
    }

我在尝试 运行 以上脚本时看到 ListFeeder 为空的异常。有人可以帮忙吗

更新代码:

class ParallelcallsSimulation extends Simulation{

  var idNumbers = (1 to 50).iterator

  val customFeeder = Iterator.continually(Map(
    "name" -> ("test_gatling_"+ idNumbers.next())
  ))

  val httpConf = http.baseUrl("http://localhost:8080")
    .header("Authorization","Bearer 6a4aee03-9172-4e31-a784-39dea65e9063")

  def createDatasetsAndUpload() = {
    repeat(3) {
      //create dataset
      feed(customFeeder).exec(http("create data").post("/create/data").header("content-type", "application/json")
        .body(StringBody("""{ "name": "${name}","description": "create data and upload file"}"""))
        .asJson.check(jsonPath("$.id").saveAs("userId")))
        .exec(session => {
          val name = session("name").asOption[String]
          println(name.getOrElse("COULD NOT FIND NAME"))
          val userId = session("userId").as[String].trim
          println("%%%%% User ID ====>"+userId)
          val datasetIdList = session("datasetIdList").asOption[List[_]].getOrElse(Nil)
          session.set("datasetIdList", userId :: datasetIdList)
        })
    }
  }
 // File Upload
  def fileUpload() = foreach("${datasetIdList}","datasetId"){
    exec(http("file upload").post("/uploadFile")
      .formUpload("File","./src/test/resources/data/File.csv")
      .header("content-type","multipart/form-data")
      .check(status is 200))
  }

  def getDataSetId() = foreach("${datasetIdList}","datasetId"){
      exec(http("get datasetId")
        .get("/get/data/${datasetId}")
        .header("content-type","application/json")
        .asJson.check(jsonPath("$.dlp.dlp_job_status").optional
        .saveAs("dlpJobStatus")).check(status is 200)
      ).exec(session => {
        val datastId = session("datasetId").asOption[String]
        println("request for datasetId >>>>>>>>"+datastId.getOrElse("datasetId not found"))
        val jobStatus = session("dlpJobStatus").asOption[String]
        println("JOB STATUS:::>>>>>>>>>>"+jobStatus.getOrElse("Dlp Job Status not Found"))
        println("Time: >>>>>>"+System.currentTimeMillis())
        session
      }).pause(10)
    }

  val scn1 = scenario("create multiple datasets and upload").exec(createDatasetsAndUpload()).exec(fileUpload())
  val scn2 = scenario("get datasetId").pause(100).exec(getDataSetId())

  setUp(scn1.inject(atOnceUsers(1)),scn2.inject(atOnceUsers(1))).protocols(httpConf)
}

当我尝试执行上面的脚本时,我看到以下错误 [错误] i.g.c.s.LoopBlock$ - 条件评估崩溃并显示消息“未定义名为 'datasetIdList' 的属性”,退出循环

var datasetIdList = List.empty[String] 定义一个指向不可变列表的可变变量。

val datasetidsFeeder = datasetIdList.map(datasetId => Map("datasetId" -> datasetId)).iterator 使用不可变列表。对 datasetIdList 的进一步更改与 datasetidsFeeder.

无关

用你的虚拟用户改变一个全局变量通常不是一个好主意。 您可以将该值保存到用户的 session 中。


在exec块中,可以这样写:

val userId = session("userId").as[String].trim
val datasetIdList = session("datasetIdList").asOption[List[_]].getOrElse(Nil)
session.set("datasetIdList", userId :: datasetIdList)

然后您可以使用 foreach 将它们全部迭代,而无需使用进纸器。

foreach("${datasetIdList}", "datasetId") {
  exec(http("file upload")
    ...
}

你应该在你的问题上做更多的工作。

  • 您的代码没有语法高亮,并且格式不正确。
  • 您说“我看到 ListFeeder 为空的异常”,但在任何地方都看不到“ListFeeder”字样。
  • 您应该 post 错误消息,以便更容易看出哪里出了问题。

在链接的文档中,有一个警告。引用如下:

Session instances are immutable!

Why is that so? Because Sessions are messages that are dealt with in a multi-threaded concurrent way, so immutability is the best way to deal with state without relying on synchronization and blocking.

A very common pitfall is to forget that set and setAll actually return new instances.

这就是更新问题中的代码不更新列表的原因。

session => {
  ...
  session.set("datasetIdList", userId :: datasetIdList)
  println("%%%% List =====>>>" + datasetIdList.toString())
  session
}

更新的会话被简单地丢弃。并在匿名函数中返回原始会话。