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Function to retrieve KSerializer by KClass and type arguments seriali…
…zers (#2291) Implemented obtainment of KSerializer by KClass in SerializersModule Resolves #2025 The limitations of this API are the inability to implement stable caching, because serialization runtime does not control the equals function of the received parameters serializers, which can cause a memory leak. Also, a technical limitation is the inability to create an array serializer. Co-authored-by: Leonid Startsev <sandwwraith@gmail.com>
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120
core/commonTest/src/kotlinx/serialization/SerializersModuleTest.kt
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| /* | ||
| * Copyright 2017-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. | ||
| */ | ||
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| package kotlinx.serialization | ||
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| 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.* | ||
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| class SerializersModuleTest { | ||
| @Serializable | ||
| object Object | ||
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| @Serializable | ||
| sealed class SealedParent { | ||
| @Serializable | ||
| data class Child(val i: Int) : SealedParent() | ||
| } | ||
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| @Serializable | ||
| abstract class Abstract | ||
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| @Serializable | ||
| enum class SerializableEnum { A, B } | ||
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| @Serializable(CustomSerializer::class) | ||
| class WithCustomSerializer(val i: Int) | ||
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| @Serializer(forClass = WithCustomSerializer::class) | ||
| object CustomSerializer | ||
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| @Serializable | ||
| class Parametrized<T : Any>(val a: T) | ||
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| class ContextualType(val i: Int) | ||
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| class ParametrizedContextual<T : Any>(val a: T) | ||
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| @Serializer(forClass = ContextualType::class) | ||
| object ContextualSerializer | ||
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| @Serializer(forClass = ParametrizedContextual::class) | ||
| object ParametrizedContextualSerializer | ||
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| @Serializable | ||
| class ContextualHolder(@Contextual val contextual: ContextualType) | ||
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| @Test | ||
| fun testCompiled() = noJsLegacy { | ||
| 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) | ||
| ) | ||
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| assertSame<KSerializer<*>>(Abstract.serializer(), serializer(Abstract::class, emptyList(), false)) | ||
| assertSame<KSerializer<*>>(SerializableEnum.serializer(), serializer(SerializableEnum::class, emptyList(), false)) | ||
| } | ||
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| @Test | ||
| fun testBuiltIn() { | ||
| assertSame<KSerializer<*>>(Int.serializer(), serializer(Int::class, emptyList(), false)) | ||
| } | ||
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| @Test | ||
| fun testCustom() { | ||
| val m = SerializersModule { } | ||
| assertSame<KSerializer<*>>(CustomSerializer, m.serializer(WithCustomSerializer::class, emptyList(), false)) | ||
| } | ||
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| @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) | ||
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| 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) | ||
| } | ||
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| @Test | ||
| fun testUnsupportedArray() { | ||
| assertFails { | ||
| serializer(Array::class, listOf(Int.serializer()), false) | ||
| } | ||
| } | ||
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| @Suppress("UNCHECKED_CAST") | ||
| @Test | ||
| fun testContextual() { | ||
| val m = SerializersModule { | ||
| contextual<ContextualType>(ContextualSerializer) | ||
| contextual<ParametrizedContextual<*>>(ParametrizedContextualSerializer as KSerializer<ParametrizedContextual<*>>) | ||
| contextual(ContextualGenericsTest.ThirdPartyBox::class) { args -> ContextualGenericsTest.ThirdPartyBoxSerializer(args[0]) } | ||
| } | ||
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| val contextualSerializer = m.serializer(ContextualType::class, emptyList(), false) | ||
| assertSame<KSerializer<*>>(ContextualSerializer, contextualSerializer) | ||
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| val boxSerializer = m.serializer(ContextualGenericsTest.ThirdPartyBox::class, listOf(Int.serializer()), false) | ||
| assertIs<ContextualGenericsTest.ThirdPartyBoxSerializer<Int>>(boxSerializer) | ||
| assertEquals(PrimitiveKind.INT, boxSerializer.descriptor.getElementDescriptor(0).kind) | ||
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| val parametrizedSerializer = m.serializer(ParametrizedContextual::class, listOf(Int.serializer()), false) | ||
| assertSame<KSerializer<*>>(ParametrizedContextualSerializer, parametrizedSerializer) | ||
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| val holderSerializer = m.serializer(ContextualHolder::class, emptyList(), false) | ||
| assertSame<KSerializer<*>>(ContextualHolder.serializer(), holderSerializer) | ||
| } | ||
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| } | ||
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