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/*
* Copyright (C) 2011 Mathias Doenitz
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package spray.json
import org.specs2.mutable._
class AdditionalFormatsSpec extends Specification {
case class Container[A](inner: Option[A])
object ReaderProtocol extends DefaultJsonProtocol {
implicit def containerReader[T :JsonFormat] = lift {
new JsonReader[Container[T]] {
def read(value: JsValue) = value match {
case JsObject(fields) if fields.contains("content") => Container(Some(jsonReader[T].read(fields("content"))))
case _ => deserializationError("Unexpected format: " + value.toString)
}
}
}
}
object WriterProtocol extends DefaultJsonProtocol {
implicit def containerWriter[T :JsonFormat] = lift {
new JsonWriter[Container[T]] {
def write(obj: Container[T]) = JsObject("content" -> obj.inner.toJson)
}
}
}
"The liftJsonWriter" should {
val obj = Container(Some(Container(Some(List(1, 2, 3)))))
"properly write a Container[Container[List[Int]]] to JSON" in {
import WriterProtocol._
obj.toJson.toString mustEqual """{"content":{"content":[1,2,3]}}"""
}
"properly read a Container[Container[List[Int]]] from JSON" in {
import ReaderProtocol._
"""{"content":{"content":[1,2,3]}}""".parseJson.convertTo[Container[Container[List[Int]]]] mustEqual obj
}
}
case class Foo(id: Long, name: String, foos: Option[List[Foo]] = None)
object FooProtocol extends DefaultJsonProtocol {
implicit val fooProtocol: JsonFormat[Foo] = lazyFormat(jsonFormat(Foo, "id", "name", "foos"))
}
"The lazyFormat wrapper" should {
"enable recursive format definitions" in {
import FooProtocol._
val json = Foo(1, "a", Some(Foo(2, "b", Some(Foo(3, "c") :: Nil)) :: Foo(4, "d") :: Nil)).toJson
json mustEqual
"""{"id":1,"name":"a","foos":[{"id":2,"name":"b","foos":[{"id":3,"name":"c"}]},{"id":4,"name":"d"}]}""".parseJson
}
}
}
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