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/*
* Copyright 2017-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.serialization
import kotlinx.serialization.builtins.*
import kotlinx.serialization.descriptors.*
import kotlinx.serialization.internal.*
import kotlinx.serialization.modules.*
import kotlinx.serialization.test.*
import kotlin.reflect.*
import kotlin.test.*
class SerializersModuleTest {
@Serializable
object Object
@Serializable
sealed class SealedParent {
@Serializable
data class Child(val i: Int) : SealedParent()
}
@Serializable
abstract class Abstract
@Serializable
enum class SerializableEnum { A, B }
@Serializable(CustomSerializer::class)
class WithCustomSerializer(val i: Int)
@Serializer(forClass = WithCustomSerializer::class)
object CustomSerializer
@Serializable
class Parametrized<T : Any>(val a: T)
@Serializable
class ParametrizedOfNullable<T>(val a: T)
class ContextualType(val i: Int)
@Serializer(forClass = ContextualType::class)
object ContextualSerializer
@Serializable
class ContextualHolder(@Contextual val contextual: ContextualType)
@Test
fun testCompiled() {
assertSame<KSerializer<*>>(Object.serializer(), serializer(Object::class, emptyList(), false))
assertSame<KSerializer<*>>(SealedParent.serializer(), serializer(SealedParent::class, emptyList(), false))
assertSame<KSerializer<*>>(
SealedParent.Child.serializer(),
serializer(SealedParent.Child::class, emptyList(), false)
)
assertSame<KSerializer<*>>(Abstract.serializer(), serializer(Abstract::class, emptyList(), false))
assertSame<KSerializer<*>>(SerializableEnum.serializer(), serializer(SerializableEnum::class, emptyList(), false))
}
@Test
fun testBuiltIn() {
assertSame<KSerializer<*>>(Int.serializer(), serializer(Int::class, emptyList(), false))
}
@Test
fun testCustom() {
val m = SerializersModule { }
assertSame<KSerializer<*>>(CustomSerializer, m.serializer(WithCustomSerializer::class, emptyList(), false))
}
@Test
fun testParametrized() {
val serializer = serializer(Parametrized::class, listOf(Int.serializer()), false)
assertEquals<KClass<*>>(Parametrized.serializer(Int.serializer())::class, serializer::class)
assertEquals(PrimitiveKind.INT, serializer.descriptor.getElementDescriptor(0).kind)
val mapSerializer = serializer(Map::class, listOf(String.serializer(), Int.serializer()), false)
assertIs<MapLikeSerializer<*, *, *, *>>(mapSerializer)
assertEquals(PrimitiveKind.STRING, mapSerializer.descriptor.getElementDescriptor(0).kind)
assertEquals(PrimitiveKind.INT, mapSerializer.descriptor.getElementDescriptor(1).kind)
}
@Suppress("UNCHECKED_CAST")
@Test
fun testNothingAndParameterizedOfNothing() {
assertEquals(NothingSerializer, Nothing::class.serializer())
//assertEquals(NothingSerializer, serializer<Nothing>()) // prohibited by compiler
assertEquals(NothingSerializer, serializer(Nothing::class, emptyList(), false) as KSerializer<Nothing>)
//assertEquals(NullableSerializer(NothingSerializer), serializer<Nothing?>()) // prohibited by compiler
assertEquals(
NullableSerializer(NothingSerializer),
serializer(Nothing::class, emptyList(), true) as KSerializer<Nothing?>
)
val parameterizedNothingSerializer = serializer<Parametrized<Nothing>>()
val nothingDescriptor = parameterizedNothingSerializer.descriptor.getElementDescriptor(0)
assertEquals(NothingSerialDescriptor, nothingDescriptor)
val parameterizedNullableNothingSerializer = serializer<ParametrizedOfNullable<Nothing?>>()
val nullableNothingDescriptor = parameterizedNullableNothingSerializer.descriptor.getElementDescriptor(0)
assertEquals(SerialDescriptorForNullable(NothingSerialDescriptor), nullableNothingDescriptor)
}
@Test
fun testUnsupportedArray() {
assertFails {
serializer(Array::class, listOf(Int.serializer()), false)
}
}
@Suppress("UNCHECKED_CAST")
@Test
fun testContextual() {
val m = SerializersModule {
contextual<ContextualType>(ContextualSerializer)
contextual(ContextualGenericsTest.ThirdPartyBox::class) { args -> ContextualGenericsTest.ThirdPartyBoxSerializer(args[0]) }
}
val contextualSerializer = m.serializer(ContextualType::class, emptyList(), false)
assertSame<KSerializer<*>>(ContextualSerializer, contextualSerializer)
val boxSerializer = m.serializer(ContextualGenericsTest.ThirdPartyBox::class, listOf(Int.serializer()), false)
assertIs<ContextualGenericsTest.ThirdPartyBoxSerializer<Int>>(boxSerializer)
assertEquals(PrimitiveKind.INT, boxSerializer.descriptor.getElementDescriptor(0).kind)
val holderSerializer = m.serializer(ContextualHolder::class, emptyList(), false)
assertSame<KSerializer<*>>(ContextualHolder.serializer(), holderSerializer)
}
}
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