I encounter NullPointerException when testing an action that processes a form. There are two actions, one to display and one to process the form. Testing the first one is fine; however, testing the second one throws the exception. This only happens with unit-testing; the application works fine (i.e., via browser). I can't figure out what happens. Could anyone help me shed some light on it? The code I'm testing is as follows.
- Scala: 2.11.8
- SBT: 0.13.11
- Play Framework: 2.5.2
build.sbt
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.11.8"
libraryDependencies ++= Seq(
"org.mockito" % "mockito-core" % "1.10.19" % Test,
"org.scalatestplus.play" %% "scalatestplus-play" % "1.5.1" % Test
)
project/plugins.sbt
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.5.2")
conf/routes
GET / controllers.FormController.showForm
POST / controllers.FormController.processForm
app/controllers/FormController.scala
package controllers
import javax.inject.Inject
import play.api.data.Form
import play.api.data.Forms._
import play.api.i18n.{I18nSupport, MessagesApi}
import play.api.mvc._
case class UserData(name: String, email: String)
class FormController @Inject()(val messagesApi: MessagesApi) extends
Controller with
I18nSupport {
def showForm = Action {
Ok(views.html.showForm(getForm))
}
def processForm = Action { implicit request =>
getForm.bindFromRequest.fold(
errForm => Ok(views.html.showForm(errForm)),
userData => Ok(userData.toString)
)
}
val getForm: Form[UserData] = Form(mapping(
"name" -> nonEmptyText,
"email" -> email
)(UserData.apply)(UserData.unapply))
}
views/main.scala.html
@(content: Html)
<!DOCTYPE html>
<html lang="en">
<body>
@content
</body>
</html>
views/showForm.scala.html
@import helper._
@(myForm: Form[UserData])(implicit messages: Messages)
@main {
<h3>Form</h3>
@form(action = routes.FormController.processForm()) {
@inputText(myForm("name"))
@inputText(myForm("email"))
<input type="submit" value="Submit">
}
}
test/controllers/FormControllerSpec.scala
package controllers
import org.scalatest.mock.MockitoSugar
import org.scalatestplus.play.PlaySpec
import play.api.i18n.MessagesApi
import play.api.test.Helpers._
import play.api.test._
class FormControllerSpec extends PlaySpec with MockitoSugar {
"FormController" when {
"showForm" should {
"display the form" in {
val cut = new FormController(mock[MessagesApi])
val response = cut.showForm(FakeRequest())
status(response) mustBe OK
}
}
"processForm" should {
"redisplay the form in case of form errors" in {
val cut = new FormController(mock[MessagesApi])
val req = FakeRequest(POST, routes.FormController.processForm.path)
val response = cut.processForm(req)
status(response) mustBe OK
}
}
}
}
Output from running test:
[info] FormControllerSpec:
[info] FormController
[info] when showForm
[info] - should display the form
[info] when processForm
[info] - should redisplay the form in case of form errors *** FAILED ***
[info] java.lang.NullPointerException:
[info] at views.html.helper.FieldElements$$anonfun$errors$2$$anonfun$apply$5.apply(Helpers.scala:35)
[info] at views.html.helper.FieldElements$$anonfun$errors$2$$anonfun$apply$5.apply(Helpers.scala:35)
[info] at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
[info] at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
[info] at scala.collection.immutable.List.foreach(List.scala:381)
[info] at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
[info] at scala.collection.immutable.List.map(List.scala:285)
[info] at views.html.helper.FieldElements$$anonfun$errors$2.apply(Helpers.scala:35)
[info] at views.html.helper.FieldElements$$anonfun$errors$2.apply(Helpers.scala:31)
[info] at scala.Option.getOrElse(Option.scala:121)
[info] ...
[info] ScalaTest
Aucun commentaire:
Enregistrer un commentaire