加特林：如何解决"cannot find impicit parameter"？

Question

我有这个加特林机模拟：

package package_name
import io.gatling.core.Predef._
import io.gatling.http.Predef._

class PerformanceTest extends Simulation {
  private val httpConfiguration = http
    .baseURL(Configuration.baseUrl)
    .acceptEncodingHeader("gzip, deflate")
    .userAgentHeader(Configuration.userAgentName)
    .inferHtmlResources()
    .maxConnectionsPerHostLikeChrome
    .disableClientSharing
    .extraInfoExtractor(dumpSessionOnFailure)
}

配置很简单object Configuration { ... }。

Gatling 不会编译测试，并指出此错误消息：

[...]\performance-test\src\gatling\scala\package_name\performance\test\PerformanceTest.scala: 
could not find implicit value for parameter configuration: io.gatling.core.config.GatlingConfiguration
  private val httpConfiguration = http
                                  ^
one error found

如何解决这个错误？

Answer 1

以下代码编译无误：

src/test/scala/package_name/PerformanceTest.scala

package package_name

import io.gatling.core.Predef._
import io.gatling.core.session.Expression
import io.gatling.http.Predef._

object Configuration {
  val userAgentName: Expression[String] = "http://computer-database.gatling.io"
  val baseUrl: String = "Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0"
}

class PerformanceTest extends Simulation {
  private val httpConfiguration = http
    .baseURL(Configuration.baseUrl)
    .acceptEncodingHeader("gzip, deflate")
    .userAgentHeader(Configuration.userAgentName)
    .inferHtmlResources()
    .maxConnectionsPerHostLikeChrome
    .disableClientSharing
    .extraInfoExtractor(dumpSessionOnFailure)
}

build.sbt

name := "gatlingdemo"

version := "0.1"

scalaVersion := "2.12.6"

libraryDependencies += "io.gatling" % "gatling-core" % "2.3.1"
libraryDependencies += "io.gatling" % "gatling-http" % "2.3.1"

这是一个快速入门：https://gatling.io/docs/2.3/quickstart/#gatling-scenario-explained

Where Configuration is a simple object Configuration {}.

Configuration不能只是object Configuration {}，应该包含userAgentName和baseUrl.

Answer 2

解决方案很简单，令人沮丧：我将包名（不是文件的位置）更改为 performance_test（之前是 com.company.performance.test）。现在代码可以完美编译。

Answer 3

在我的例子中，我在模拟中定义了如下变量 class

val configuration = ConfigFactory.load()..

导致问题的原因...具有相同的消息

加特林：如何解决"cannot find impicit parameter"？

Gatling: How to solve "cannot find impicit parameter"?

scala

gatling

scala-gatling