Generators.scala

package helpers 

object Generators {
  private val epoch = new DateTime(0)
  val nameGen = for {
    head <- Gen.alphaUpperChar
    size<- Gen.choose(1,10)
    tail <- Gen.listOfN(size,Gen.alphaLowerChar)
  } yield (head +: tail).mkString("")
}

gistfile1.txt

The MIT License (MIT)

Copyright (c) 2014 Jean Helou

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

WithTestApplication.scala

package helpers

abstract class WithTestApplication(val app: FakeApplication = FakeApplication()) extends Around with Scope {

  import stubs.TestExecutionContext._
  import scala.concurrent.Await
  import play.modules.reactivemongo.ReactiveMongoPlugin
  import scala.concurrent.duration._

  lazy val dbName = Generators.nameGen.sample.get // create  a new random database name for this test
  lazy val db= new MongoDriver().connection(Seq("localhost")).db(dbName)
  lazy val appWithFakeDb = app.copy(additionalConfiguration = app.additionalConfiguration + ("mongodb.db" -> dbName))

  implicit def implicitApp: FakeApplication = appWithFakeDb

  override def around[T: AsResult](t: => T): Result ={

    try{
      Helpers.running(appWithFakeDb)({
        val logger = Logger("helpers.WithTestApplication")
        logger.info("preparing to run tests")
        try {
         //db fixtures which are not created by the application
        }catch {
          case e:Throwable => logger.error("unable to save data",e); throw e;
        }
        val r = AsResult.effectively(t)
        r
      })
    }finally{
      val dropped = db.drop()
      dropped.recover{  case throwable =>
          println(s"unable to drop test db $dbName")
          println(throwable.getMessage)
          throwable.printStackTrace()
      }.map(_ => db.connection.close())
      Await.result(dropped, 10.seconds)
    }
  }

}