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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.json
import kotlinx.serialization.*
import kotlinx.serialization.test.assertFailsWithSerial
import kotlin.test.*
class JsonCoerceInputValuesTest : JsonTestBase() {
@Serializable
data class WithBoolean(val b: Boolean = false)
@Serializable
data class WithEnum(val e: SampleEnum = SampleEnum.OptionC)
@Serializable
data class MultipleValues(
val data: StringData,
val data2: IntData = IntData(0),
val i: Int = 42,
val e: SampleEnum = SampleEnum.OptionA,
val foo: String
)
@Serializable
data class NullableEnumHolder(
val enum: SampleEnum?
)
@Serializable
class Uncoercable(
val s: String
)
@Serializable
class UncoercableEnum(
val e: SampleEnum
)
val json = Json {
coerceInputValues = true
isLenient = true
}
private fun <T> doTest(inputs: List<String>, expected: T, serializer: KSerializer<T>) {
for (input in inputs) {
parametrizedTest(json) {
assertEquals(expected, decodeFromString(serializer, input), "Failed on input: $input")
}
}
}
@Test
fun testUseDefaultOnNonNullableBoolean() = doTest(
listOf(
"""{"b":false}""",
"""{"b":null}""",
"""{}""",
),
WithBoolean(),
WithBoolean.serializer()
)
@Test
fun testUseDefaultOnUnknownEnum() {
doTest(
listOf(
"""{"e":unknown_value}""",
"""{"e":"unknown_value"}""",
"""{"e":null}""",
"""{}""",
),
WithEnum(),
WithEnum.serializer()
)
assertFailsWithSerial("JsonDecodingException") {
json.decodeFromString(WithEnum.serializer(), """{"e":{"x":"definitely not a valid enum value"}}""")
}
assertFailsWithSerial("JsonDecodingException") { // test user still sees exception on missing quotes
Json(json) { isLenient = false }.decodeFromString(WithEnum.serializer(), """{"e":unknown_value}""")
}
}
@Test
fun testUseDefaultInMultipleCases() {
val testData = mapOf(
"""{"data":{"data":"foo"},"data2":null,"i":null,"e":null,"foo":"bar"}""" to MultipleValues(
StringData("foo"),
foo = "bar"
),
"""{"data":{"data":"foo"},"data2":{"intV":42},"i":null,"e":null,"foo":"bar"}""" to MultipleValues(
StringData(
"foo"
), IntData(42), foo = "bar"
),
"""{"data":{"data":"foo"},"data2":{"intV":42},"i":0,"e":"NoOption","foo":"bar"}""" to MultipleValues(
StringData("foo"),
IntData(42),
i = 0,
foo = "bar"
),
"""{"data":{"data":"foo"},"data2":{"intV":42},"i":0,"e":"OptionC","foo":"bar"}""" to MultipleValues(
StringData("foo"),
IntData(42),
i = 0,
e = SampleEnum.OptionC,
foo = "bar"
),
)
for ((input, expected) in testData) {
assertEquals(expected, json.decodeFromString(MultipleValues.serializer(), input), "Failed on input: $input")
}
}
@Test
fun testNullSupportForEnums() = parametrizedTest(json) {
var decoded = decodeFromString<NullableEnumHolder>("""{"enum": null}""")
assertNull(decoded.enum)
decoded = decodeFromString<NullableEnumHolder>("""{"enum": OptionA}""")
assertEquals(SampleEnum.OptionA, decoded.enum)
}
@Test
fun propertiesWithoutDefaultValuesDoNotChangeErrorMsg() {
val json2 = Json(json) { coerceInputValues = false }
parametrizedTest { mode ->
val e1 = assertFailsWith<SerializationException>() { json.decodeFromString<Uncoercable>("""{"s":null}""", mode) }
val e2 = assertFailsWith<SerializationException>() { json2.decodeFromString<Uncoercable>("""{"s":null}""", mode) }
assertEquals(e2.message, e1.message)
}
}
@Test
fun propertiesWithoutDefaultValuesDoNotChangeErrorMsgEnum() {
val json2 = Json(json) { coerceInputValues = false }
parametrizedTest { mode ->
val e1 = assertFailsWith<SerializationException> { json.decodeFromString<UncoercableEnum>("""{"e":"UNEXPECTED"}""", mode) }
val e2 = assertFailsWith<SerializationException> { json2.decodeFromString<UncoercableEnum>("""{"e":"UNEXPECTED"}""", mode) }
assertEquals(e2.message, e1.message)
}
}
}
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