gistfile1.txt

// Class
package presenters.poiattributes

import scala.language.implicitConversions
import play.api.templates.Html


trait AttributePresenter {
  val identifier: String
  val value: Any

  def toHtml : Html

  def isDefined : Boolean = {
    value match {
      case value: Seq[_] if value.isEmpty => false
      case o: Option[_] => o match {
        case None => false
        case Some(_) => true
      }
      case _ => true
    }
  }
}


// SPEC
package presenters.poiattributes

import test.LoMSpec
import play.api.templates.Html

class AttributePresenterSpec extends LoMSpec {

  "attribute presenter" should {
    "require identifier and value" in {
      GeneralAttribute("Test", None) must throwAn [IllegalArgumentException]
      GeneralAttribute(None, "Test") must throwAn [IllegalArgumentException]
    }

    "have method toHtml" in {
      GeneralAttribute("Test", "Test").toHtml.body must equalTo("Test")
    }

    "have method isDefined that returns a boolean if a valid value or non-empty seq" in {
      GeneralAttribute("Test", Some(List(1, 2, 3))).isDefined must beTrue
      GeneralAttribute("Test", "").isDefined must beTrue
      GeneralAttribute("Test", None).isDefined must beFalse
      GeneralAttribute("Test", Some(List())).isDefined must beFalse
    }
  }
}

case class GeneralAttribute(identifier: String, value: Option[Any]) extends AttributePresenter {
  def toHtml : Html = Html(value.toString)
}