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package cc.spray.json
import org.specs2.mutable._
class ProductFormatsSpec extends Specification {
case class Test2(a: Int, b: Option[Double])
case class Test3[A, B](as: List[A], bs: List[B])
trait TestProtocol {
this: DefaultJsonProtocol =>
implicit val test2Format = jsonFormat(Test2, "a", "b")
implicit def test3Format[A: JsonFormat, B: JsonFormat] = jsonFormat(Test3.apply[A, B], "as", "bs")
}
object TestProtocol1 extends DefaultJsonProtocol with TestProtocol
object TestProtocol2 extends DefaultJsonProtocol with TestProtocol with NullOptions
"A JsonFormat created with `jsonFormat`, for a case class with 2 elements," should {
import TestProtocol1._
val obj = Test2(42, Some(4.2))
val json = JsObject(JsField("a", JsNumber(42)), JsField("b", JsNumber(4.2)))
"convert to a respective JsObject" in {
obj.toJson mustEqual json
}
"convert a JsObject to the respective case class instance" in {
json.convertTo[Test2] mustEqual obj
}
"throw a DeserializationException if the JsObject does not all required members" in (
JsObject(JsField("b", JsNumber(4.2))).convertTo[Test2] must
throwA(new DeserializationException("Object is missing required member 'a'"))
)
"not require the presence of optional fields for deserialization" in {
JsObject(JsField("a", JsNumber(42))).convertTo[Test2] mustEqual Test2(42, None)
}
"not render `None` members during serialization" in {
Test2(42, None).toJson mustEqual JsObject(JsField("a", JsNumber(42)))
}
"ignore additional members during deserialization" in {
JsObject(JsField("a", JsNumber(42)), JsField("b", JsNumber(4.2)), JsField("c", JsString('no))).convertTo[Test2] mustEqual obj
}
"not depend on any specific member order for deserialization" in {
JsObject(JsField("b", JsNumber(4.2)), JsField("a", JsNumber(42))).convertTo[Test2] mustEqual obj
}
"throw a DeserializationException if the JsValue is not a JsObject" in (
JsNull.convertTo[Test2] must throwA(new DeserializationException("Object expected"))
)
}
"A JsonProtocol mixing in NullOptions" should {
"render `None` members to `null`" in {
import TestProtocol2._
Test2(42, None).toJson mustEqual JsObject(JsField("a", JsNumber(42)), JsField("b", JsNull))
}
}
"A JsonFormat for a generic case class and created with `jsonFormat`" should {
import TestProtocol1._
val obj = Test3(42 :: 43 :: Nil, "x" :: "y" :: "z" :: Nil)
val json = JsObject(
JsField("as", JsArray(JsNumber(42), JsNumber(43))),
JsField("bs", JsArray(JsString("x"), JsString("y"), JsString("z")))
)
"convert to a respective JsObject" in {
obj.toJson mustEqual json
}
"convert a JsObject to the respective case class instance" in {
json.convertTo[Test3[Int, String]] mustEqual obj
}
}
}
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