Question

specs2具有Before，After，Around等特征，以便能够在setup / teardown代码中包装示例。

是否有任何东西可以支持为ScalaCheck属性的每个“迭代”设置和拆除测试基础架构，即ScalaCheck要测试的每个值或值集？

看起来像specs2的各种Before，After，Around特征是围绕返回或抛出specs2 Result实例而设计的，而Prop不是结果。

Answer 1

现在已在最新的1.12.2-SNAPSHOT中修复。你现在可以写：

import org.specs2.ScalaCheck
import org.specs2.mutable.{Around, Specification}
import org.specs2.execute.Result

class TestSpec extends Specification with ScalaCheck {
  "test" >> prop { i: Int =>
    around(i must be_>(1))
  }

  val around = new Around {
    def around[T <% Result](t: =>T) = {
      ("testing a new Int").pp
      try { t }
      finally { "done".pp }
    }
  }    
}

这将执行Property的“body”之前和之后的代码。

您还可以更进一步，创建一种支持方法，将隐式around传递给您的道具：

class TestSpec extends Specification with ScalaCheck {
  "test" >> propAround { i: Int =>
    i must be_>(1)
  }

  // use any implicit "Around" value in scope
  def propAround[T, R](f: T => R)
                      (implicit a: Around, 
                       arb: Arbitrary[T], shrink: Shrink[T], 
                       res: R => Result): Result =
    prop((t: T) => a(f(t)))

  implicit val around = new Around {
    def around[T <% Result](t: =>T) = {
      ("testing a new Int").pp
      try { t }
      finally { "done".pp }
    }
  }
}

ScalaCheck之前/之后/周围？

1 个答案: