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package spray.json
import org.scalatest._
class OptionFieldTests
extends FlatSpec
with FormatTests {
sealed trait Super
case class Opt(x: Option[Int]) extends Super
object HideNull extends DerivedJsonProtocol {
override def printNull = false
implicit val optFmt = jsonFormat[Opt]
}
object ShowNull extends DerivedJsonProtocol {
override def printNull = true
implicit val optFmt = jsonFormat[Opt]
}
"Option fields with some value" should behave like checkRoundtrip(
Opt(Some(2)),
"""{"x":2}"""
)(HideNull.optFmt)
"Option fields with some value (show null)" should behave like checkRoundtrip(
Opt(Some(2)),
"""{"x":2}"""
)(ShowNull.optFmt)
"Option fields with null value" should behave like checkRoundtrip(
Opt(None),
"""{}"""
)(HideNull.optFmt)
"Option fields with null value (show null)" should behave like checkRoundtrip(
Opt(None),
"""{"x":null}"""
)(ShowNull.optFmt)
"Option fields with undefined value" should "deserialize" in {
import HideNull._
assert("{}".parseJson.convertTo[Opt] == Opt(None))
}
"Option fields with undefined value (show null)" should "deserialize" in {
import ShowNull._
assert("{}".parseJson.convertTo[Opt] == Opt(None))
}
{
import ShowNull._
implicit val superFmt = jsonFormat[Super]
"Option fields of ADTs" should behave like checkRoundtrip(
Opt(Some(2)): Super,
"""{ "@type": "Opt", "x":2}"""
)
}
sealed trait Enum
case class Value(x: Int) extends Enum
case class Wrapper(enum: Option[Enum])
import ShowNull._
implicit val enumFormat: RootJsonFormat[Enum] = jsonFormat[Enum]
implicit val superFmt: RootJsonFormat[Wrapper] = jsonFormat[Wrapper]
"Option fields of inner ADTs" should behave like checkRoundtrip(
Wrapper(Some(Value(1))),
"""{"enum":{"@type":"Value", "x": 1}}"""
)
}
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