Specs2和@ Before/@ After-like方法

Question

鉴于代码如下:

class RESTAcceptanceTest extends Specification {

  override def is = anonymous ^ signinOAuth

  def anonymous = "Something"       ^ givenSomething ^
                  "must happen"     ^ mustHappen 
  end

  def signinOAuth = "Signin"                ^ givenSignin ^
                    "works as expected"     ^ userExistsInDatabase 
  end

  // rest of object definitions

}

如何确保在"anonymous" 和 "signinOAuth" 之前/之后执行相同的代码之前和之后,即使测试失败,"after"方法也应该执行？

Answer 1

如果您使用给定/何时/然后步骤，您可以使用上下文来控制每个示例之前和之后执行的内容：

import org.specs2._
import specification._

class MySpec extends Specification { def is = 
  "anonymous" ^ 
    "something" ^ something ^
    "must happen" ^ mustHappen ^ endp^
  "OAuth"^ 
    "signing" ^ signing ^
    "works ok" ^ worksOk

  lazy val something: Given[Int] = (s: String) => { s.pp; 1 } 
  lazy val mustHappen: Then[Int] = (i: Int) => (s: String)  => 
    context { s.pp; i must_== 1       }

  lazy val signing:  Given[Int] = (s: String) => { s.pp; 2 }
  lazy val worksOk: Then[Int] = (i: Int) => (s: String) => 
    context { s.pp; i must_== 2 }

  lazy val context = new BeforeAfter {
   def  before = "before".pp
   def after = "after".pp
  }
}

在上面的代码中，对象apply的方法context用于包装要使用before和执行的代码after。此外，如果您向其中一个示例添加错误，您将看到“之后”代码始终被执行。

PS：pp是一个实用方法，例如println在执行过程中在终端中显示某些内容。相对于 println 的优点是它返回其参数，因此您可以编写1.pp must_== 1