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/*
* Copyright 2017-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
@file:Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
package kotlinx.serialization.features
import kotlinx.serialization.*
import kotlinx.serialization.builtins.serializer
import kotlinx.serialization.json.*
import kotlinx.serialization.json.internal.BATCH_SIZE
import kotlinx.serialization.modules.*
import kotlinx.serialization.test.*
import org.junit.Test
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
class JsonJvmStreamsTest {
private val strLen = BATCH_SIZE * 2 + 42
@Test
fun testParsesStringsLongerThanBuffer() {
val str = "a".repeat(strLen)
val input = """{"data":"$str"}"""
assertEquals(input, Json.encodeViaStream(StringData.serializer(), StringData(str)))
assertEquals(str, Json.decodeViaStream(StringData.serializer(), input).data)
assertEquals(str, Json.decodeViaStream(String.serializer(), "\"$str\""))
}
@Test
fun testSkipsWhitespacesLongerThanBuffer() {
val str = "a".repeat(strLen)
val ws = " ".repeat(strLen)
val input = """{"data":$ws"$str"}"""
assertEquals("""{"data":"$str"}""", Json.encodeViaStream(StringData.serializer(), StringData(str)))
assertEquals(str, Json.decodeViaStream(StringData.serializer(), input).data)
}
@Test
fun testHandlesEscapesLongerThanBuffer() {
val str = "\\t".repeat(strLen)
val expected = "\t".repeat(strLen)
val input = """{"data":"$str"}"""
assertEquals(input, Json.encodeViaStream(StringData.serializer(), StringData(expected)))
assertEquals(expected, Json.decodeViaStream(StringData.serializer(), input).data)
}
@Test
fun testHandlesLongLenientStrings() {
val str = "a".repeat(strLen)
val input = """{"data":$str}"""
val json = Json { isLenient = true }
assertEquals(str, json.decodeViaStream(StringData.serializer(), input).data)
assertEquals(str, json.decodeViaStream(String.serializer(), str))
}
@Test
fun testThrowsCorrectExceptionOnEof() {
assertFailsWith<SerializationException> {
Json.decodeViaStream(StringData.serializer(), """{"data":""")
}
assertFailsWith<SerializationException> {
Json.decodeViaStream(StringData.serializer(), "")
}
assertFailsWith<SerializationException> {
Json.decodeViaStream(String.serializer(), "\"")
}
}
@Test
fun testRandomEscapeSequences() {
repeat(1000) {
val s = generateRandomUnicodeString(strLen)
try {
val serializer = String.serializer()
val b = ByteArrayOutputStream()
Json.encodeToStream(serializer, s, b)
val restored = Json.decodeFromStream(serializer, ByteArrayInputStream(b.toByteArray()))
assertEquals(s, restored)
} catch (e: Throwable) {
// Not assertion error to preserve cause
throw IllegalStateException("Unexpectedly failed test, cause string: $s", e)
}
}
}
interface Poly
@Serializable
@SerialName("Impl")
data class Impl(val str: String) : Poly
@Test
fun testPolymorphismWhenCrossingBatchSizeNonLeadingKey() {
val json = Json {
serializersModule = SerializersModule {
polymorphic(Poly::class) {
subclass(Impl::class, Impl.serializer())
}
}
}
val longString = "a".repeat(BATCH_SIZE - 5)
val string = """{"str":"$longString", "type":"Impl"}"""
val golden = Impl(longString)
val deserialized = json.decodeViaStream(serializer<Poly>(), string)
assertEquals(golden, deserialized as Impl)
}
@Test
fun testPolymorphismWhenCrossingBatchSize() {
val json = Json {
serializersModule = SerializersModule {
polymorphic(Poly::class) {
subclass(Impl::class, Impl.serializer())
}
}
}
val aLotOfWhiteSpaces = " ".repeat(BATCH_SIZE - 5)
val string = """{$aLotOfWhiteSpaces"type":"Impl", "str":"value"}"""
val golden = Impl("value")
val deserialized = json.decodeViaStream(serializer<Poly>(), string)
assertEquals(golden, deserialized as Impl)
}
}
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