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/*
* Copyright 2019 JetBrains s.r.o.
*
* 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 kotlinx.serialization.features
import kotlinx.serialization.*
import kotlinx.serialization.modules.*
import kotlinx.serialization.json.Json
import kotlin.test.*
// this has implicit @Polymorphic
interface IMessage {
val body: String
}
// and this class too has implicit @Polymorphic
@Serializable
abstract class Message() : IMessage {
abstract override val body: String
}
@Polymorphic
@Serializable
@SerialName("SimpleMessage") // to cut out package prefix
open class SimpleMessage() : Message() {
override var body: String = "Simple"
}
@Serializable
@SerialName("DoubleSimpleMessage")
class DoubleSimpleMessage(val body2: String) : SimpleMessage()
@Serializable
@SerialName("MessageWithId")
open class MessageWithId(val id: Int, override val body: String) : Message()
@Serializable
class Holder(
val iMessage: IMessage,
val iMessageList: List<IMessage>,
val message: Message,
val msgSet: Set<Message>,
val simple: SimpleMessage,
// all above should be polymorphic
val withId: MessageWithId // but this not
)
class PolymorphicOnClassesTest {
private fun genTestData(): Holder {
var cnt = -1
fun gen(): MessageWithId {
cnt++
return MessageWithId(cnt, "Message #$cnt")
}
return Holder(gen(), listOf(gen(), gen()), gen(), setOf(SimpleMessage()), DoubleSimpleMessage("DoubleSimple"), gen())
}
private val testModule = SerializersModule {
polymorphic(Message::class, IMessage::class, SimpleMessage::class) {
addSubclass(SimpleMessage::class, SimpleMessage.serializer())
addSubclass(DoubleSimpleMessage::class, DoubleSimpleMessage.serializer())
addSubclass(MessageWithId::class, MessageWithId.serializer())
}
}
@Test
fun testEnablesImplicitlyOnInterfacesAndAbstractClasses() {
val json = Json { unquoted = true; prettyPrint = false; useArrayPolymorphism = true; serialModule = testModule }
val data = genTestData()
assertEquals("""{iMessage:[MessageWithId,{id:0,body:"Message #0"}],iMessageList:[[MessageWithId,{id:1,body:"Message #1"}],[MessageWithId,{id:2,body:"Message #2"}]],message:[MessageWithId,{id:3,body:"Message #3"}],msgSet:[[SimpleMessage,{body:Simple}]],simple:[DoubleSimpleMessage,{body:Simple,body2:DoubleSimple}],withId:{id:4,body:"Message #4"}}""", json.stringify(Holder.serializer(), data))
}
@Test
fun descriptorsSchemaIsCorrect() {
val desc = Holder.serializer().descriptor
assertSame(PolymorphicClassDescriptor, desc.getElementDescriptor(0))
}
}
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