Scala

Question

我有一个正在测试 class 的测试，它需要一个隐式的 CustomExecutionContext:

@Singleton
class MyRepo @Inject()
(appConfigService: AppConfigService)
(implicit ec: RepositoryDispatcherContext)

现在我需要测试这个 class 并在测试期间注入模拟调度程序上下文。最初我想使用开箱即用的标准全局执行上下文。

implicit executionContext = scala.concurrent.ExecutionContext.Implicits.global

但测试失败，因为它需要另一种类型的实例：

could not find implicit value for parameter ec: common.executor.RepositoryDispatcherContext

这是我的自定义执行上下文：

import javax.inject.{Inject}
import akka.actor.ActorSystem
import play.api.libs.concurrent.CustomExecutionContext

class RepositoryDispatcherContext @Inject()(actorSystem: ActorSystem) extends CustomExecutionContext(actorSystem, "repository.dispatcher")

想知道如何注入我的自定义执行上下文的模拟实例以用作我的测试中的隐式参数class？

Answer 1

您可以创建自定义调度程序的子 class 并覆盖必要的方法：

import org.specs2.mutable.Specification

import akka.actor.ActorSystem
import scala.concurrent.ExecutionContext

class MySomethingSpec extends Specification with Mockito {

  "MySomething" should {    

    "mock repository dispatcher itself" in {
      class MyMockedRepositoryDispatcher(executionContext: ExecutionContext) extends RepositoryDispatcherContext(ActorSystem()) {
        override def execute(command: Runnable) = executionContext.execute(command)
        override def reportFailure(cause: Throwable) = executionContext.reportFailure(cause)
      }

      val executionContext: ExecutionContext = ??? // whatever you need
      val repositoryDispatcher: RepositoryDispatcherContext = new MyMockedRepositoryDispatcher(executionContext)

      // do what you need
      // assertions
    }
  }
}

Scala - Play - 如何在测试中模拟导入 play.api.libs.concurrent.CustomExecutionContext 并将其用作隐式参数？

Scala - Play - How to mock import play.api.libs.concurrent.CustomExecutionContext in Test and use it as an implicit param?

unit-testing

mocking

playframework

executioncontext