How to test serialisation in Scala?

Question

How to define Default parameters in Scala? What is the use of Default Parameters in Scala? How to avoid implementing Auxiliary Constructors or Multiple Constructors in Scala?

Answer 1

In order to check that everything works fine, we can create unit tests. Add the ScalaTest dependency in the SBT file. It should look like this now:

name := "proectj-name"

version := "1.0"

scalaVersion := "2.11.7"

libraryDependencies ++= Seq(
  "org.scalatest" % "scalatest_2.11" % "3.0.0-SNAP5" % "test",
  "com.typesafe.play" % "play-json_2.11" % "2.4.2")

And write tests for the Payment:

import models._
import models.Payment._

import org.scalatest._
import play.api.libs.json._

class PaymentTest extends FlatSpec with Matchers {

  val address = Address("1375 Burlingame Ave.", None, "Burlingame", "California", "94010")

  "Payment " should "be converted to JSON correctly " in {

    val payment = Payment(1, "creditCard", address, "wdweadowei3209423", "123")
    val paymentJSON = writePayment(payment)

    (paymentJSON \ ("id")).get should be (JsNumber(1))
    (paymentJSON \ ("type")).get should be (JsString("creditCard"))
    (paymentJSON \ ("address")).get should be (Json.toJson(payment.address))
    (paymentJSON \ ("token")).get should be (JsString("wdweadowei3209423"))
    (paymentJSON \ ("cvv")).get should be (JsString("123"))

  }

  it should " be deserialized correctly " in {
    val paymentJSON: JsValue = JsObject(Seq(
      "id" -> JsNumber(1),
      "type" -> JsString("creditCard"),
      "address" -> Json.toJson(address),
      "token" -> JsString("wdweadowei3209423"),
      "cvv" -> JsString("123")
    ))

    val payment = readPayment(paymentJSON)

    payment.id should be (1)
    payment.pType should be ("creditCard")
    payment.address should be (address)
    payment.token should be ("wdweadowei3209423")
    payment.cvv should be ("123")
  }

}