为什么有时在Spec2中无法捕获异常?

时间:2014-03-31 10:28:17

标签: scala exception testing spec2

scala测试代码:

import play.api.test._
import scala._
import org.specs2.execute.Result

object ThrowTest extends PlaySpecification {

  "throwA" should {
    "catch the exception test1" in {
      world must throwA[Exception]
    }
    "catch the exception test2" in {
      hello {
        world =>
          world must throwA[Exception]
      }
    }
  }

  def hello(action: (String) => Result) = {
    action(world)
  }

  def world: String = {
    throw new Exception("world-exception")
  }

}

为什么test1按预期工作,但test2不是,它将异常抛出到外部并且永远不会捕获它:

[info] ! catch the exception test2
[error]     Exception: world-exception (ThrowTest.scala:26)
[error] database.ThrowTest$.world(ThrowTest.scala:26)
[error] database.ThrowTest$.hello(ThrowTest.scala:22)
[error] database.ThrowTest$$anonfun$1$$anonfun$apply$4.apply(ThrowTest.scala:14)
[error] database.ThrowTest$$anonfun$1$$anonfun$apply$4.apply(ThrowTest.scala:14)
[info] Total for specification ThrowTest

1 个答案:

答案 0 :(得分:2)

因为对于测试2,在调用hello之前,action 会抛出异常。 actionString => Result,您可以使用world来调用它 - 在评估时 - 抛出异常,因此,所有这些代码:

world =>world must throwA[Exception]

永远不会被执行。