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/*
* Copyright 2017-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.serialization
import kotlinx.serialization.descriptors.*
import kotlinx.serialization.encoding.*
import kotlinx.serialization.json.*
import org.junit.Test
import java.util.*
import kotlin.test.*
class SerializerForNullableJavaTypeTest {
// User-reported generic serialization
class DateSerializer : KSerializer<Date?> {
override val descriptor = PrimitiveSerialDescriptor("LocalTime?", PrimitiveKind.LONG).nullable
override fun deserialize(decoder: Decoder): Date? = when (val seconds = decoder.decodeLong()) {
-1L -> null
else -> Date(seconds)
}
override fun serialize(encoder: Encoder, value: Date?) {
when (value) {
null -> encoder.encodeLong(-1L) //this line is never reached despite that nulls exist in serialized lists
else -> encoder.encodeLong(value.toInstant().toEpochMilli())
}
}
}
@Serializable
private data class ListWrapper(val times: List<@Serializable(with = DateSerializer::class) Date?>)
@Test
fun testMixedList() {
val data = ListWrapper(listOf(Date(42), null))
val str = Json.encodeToString(data)
assertEquals("""{"times":[42,-1]}""", str)
assertEquals(data, Json.decodeFromString(str))
}
}
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