Testing Scalatra with Immutable Specs2

import org.specs2.Specification
import org.specs2.mock.Mockito
import org.scalatra.test.ScalatraTests
import org.eclipse.jetty.testing.ServletTester
import org.specs2.specification.After

class MySpec extends Specification { def is = 
  "My spec must" ^
  "verify that scalatra can be tested" ! Specs().assert()

  /**
   * Create a new jetty context each time
   * This lets us mock expectations *per* specification
   */
  case class Specs() extends After with ScalatraTests with Mockito {
    // The servlet tester gives an http context to your tests
    lazy val tester = new ServletTester
    tester.start()

    val myMock = mock[MyObject]

    // Register your servlet with the context and inject the mock
    addServlet(new MyServlet(myMock), "/*")

    // don't leave the jetty context hanging around
    def after { tester.stop() }

    // Pay special attention to the "this" keyword, which will provide the
    // ...method in a scope such that "after" may be called for teardown
    def assert() = this {
      // Just some expectation on the mock object
      myMock.get(0) returns true

      get("/") {
        there was one(myMock).get(0)
      }
    }
  }
}