gatling - Gatling 从 csv 文件中获取

Question

通过从 Google Chrome 创建一个“.har”文件，我创建了一个 Gatling 模拟。而且我已经更改了输入参数并尝试从“.csv”文件中获取数据。现在，当我运行模拟时，如何检查 Gatling 模拟是否已从“.csv”文件中获取数据字段？

Answer 1

在 conf/logback.xml 中暂时将日志级别降低到 DEBUG，您将看到正在生成的请求。

Answer 2

Gatling 有相当好的错误处理/记录连接到馈线。

1. 当您提供错误的文件名或馈送文件路径时，您将收到以下错误（java.lang.IllegalArgumentException：无法找到馈送文件）。请注意，测试不会运行。

   java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
   at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
   Caused by: java.lang.IllegalArgumentException: Could not locate feeder file: file gatling/src/test/resources/data/wrongFile.csv doesn't exist
   at io.gatling.core.feeder.FeederSupport$class.feederBuilder(FeederSupport.scala:53)
   at io.gatling.core.Predef$.feederBuilder(Predef.scala:22)
   at io.gatling.core.feeder.FeederSupport$class.separatedValues(FeederSupport.scala:44)
   at io.gatling.core.Predef$.separatedValues(Predef.scala:22)
   at io.gatling.core.feeder.FeederSupport$class.separatedValues(FeederSupport.scala:41)
   at io.gatling.core.Predef$.separatedValues(Predef.scala:22)
   at io.gatling.core.feeder.FeederSupport$class.csv(FeederSupport.scala:34)
   at io.gatling.core.Predef$.csv(Predef.scala:22)
   at com.scenario.Scenario.<init>(Scenario.scala:10)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
   at java.lang.Class.newInstance(Class.java:442)
   at io.gatling.app.Gatling$.io$gatling$app$Gatling$$$anonfun$1(Gatling.scala:41)
   at io.gatling.app.Gatling.run(Gatling.scala:92)
   at io.gatling.app.Gatling.runIfNecessary(Gatling.scala:75)
   at io.gatling.app.Gatling.start(Gatling.scala:65)
   at io.gatling.app.Gatling$.start(Gatling.scala:57)
   at io.gatling.app.Gatling$.fromArgs(Gatling.scala:49)
   at io.gatling.app.Gatling$.main(Gatling.scala:43)
   at io.gatling.app.Gatling.main(Gatling.scala)
   

2. 当您的属性与 feeder 中的列名不匹配时，您将收到以下错误。所有测试都会以错误结束。

   00:10:07.937 [ERROR] i.g.h.a.s.HttpRequestAction - 'httpRequest-1' failed to execute: No attribute named 'wrongAttributeName' is defined
   

3. 当您有带有馈线数据的空文件时，您将收到以下错误。

   java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
      at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
   Caused by: java.lang.IllegalStateException: Feeder is now empty, stopping engine
      at io.gatling.core.action.SingletonFeed$$anonfun$receive$1.applyOrElse(SingletonFeed.scala:61)
      at akka.actor.Actor$class.aroundReceive(Actor.scala:482)
      at io.gatling.core.akka.BaseActor.aroundReceive(BaseActor.scala:23)
      at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
      at akka.actor.ActorCell.invoke(ActorCell.scala:495)
      at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
      at akka.dispatch.Mailbox.run(Mailbox.scala:224)
      at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
      at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
      at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
      at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
      at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
   

当这些都没有出现时，您几乎可以确定一切正常。但是要验证 Gatling 发送的参数，您可以检查

1. logback.xml 中的 Gatling 日志（将日志级别更改为 DEBUG）

   <root level="DEBUG">
       <appender-ref ref="CONSOLE" />
   </root>
   

   然后你会看到类似的日志

   00:13:53.233 [DEBUG] i.g.h.a.s.HttpTx$ - Sending request=Action name uri=http://your-rest-service?param1=value1&param2=value2: scenario=com.scenario.Scenario Scenario name, userId=1
   

2. 访问服务器上的日志。例如，在 Tomcat 指令中，您可以在此处获取