$scala -classpath scalatest.jar
 Welcome to Scala version 2.7.5.final (Java HotSpot(TM) Client VM, Java 1.5.0_16).
 Type in expressions to have them evaluated.
 Type :help for more information.
 
 scala> import org.scalatest.PrivateMethodTester._                 
 import org.scalatest.PrivateMethodTester._
 
 scala> class Example {
      |   private def addSesame(prefix: String) = prefix + " sesame"
      | }
 defined class Example
 
 scala> val example = new Example
 example: Example = Example@d8b6fe
 
 scala> val addSesame = PrivateMethod[String]('addSesame)           
 addSesame: org.scalatest.PrivateMethodTester.PrivateMethod[String] = org.scalatest.PrivateMethodTester$PrivateMethod@5cdf95
 
 scala> example invokePrivate addSesame("open")                     
 res0: String = open sesame