Scala example source code file (TimerTest.scala)

This example Scala source code file (TimerTest.scala) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Scala by Example" ^TM.

Learn more about this Scala project at its project page.

Java - Scala tags/keywords

future, speclite, test, timeout, timer, timertest

The TimerTest.scala Scala example source code

package scalaz
package concurrent

import ConcurrentTest._
import scalaz.syntax.either._

object TimerTest extends SpecLite {
  def withTimer[T](expression: Timer => T): T = {
    val timer = new Timer(10)
    try {
      expression(timer)
    } finally {
      timer.stop()
    }
  }
  "Timer" should {
    "stop normally" in {
      withTimer(timer => ())
    }
    "handle stop being called repeatedly" in {
      withTimer{timer =>
        timer.stop()
      }
    }
    "valueWait produces a value after the specified timeout" in {
      withTimer{timer =>
        val start = System.currentTimeMillis
        withTimeout(5000){
          timer.valueWait("Test", 100).unsafePerformSync must_== "Test"
          (System.currentTimeMillis - start) >= 100
        }
      }
    }
    "withTimeout(Future...) produces a Timeout if the timeout is exceeded" in {
      withTimer{timer =>
        val future = timer.withTimeout(Future{Thread.sleep(500); "Test"}, 100)
        withTimeout(5000){
          future.unsafePerformSync must_== Timeout.left
        }
      }
    }
    "produces the result of the Future if the timeout is not exceeded" in {
      withTimer{timer =>
        val future = timer.withTimeout(Future{Thread.sleep(50); "Test"}, 200)
        withTimeout(5000){
          future.unsafePerformSync must_== "Test".right
        }
      }
    }
  }
}