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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.builtins
import kotlinx.serialization.*
import kotlinx.serialization.json.*
import kotlinx.serialization.test.*
import kotlin.test.*
class KeyValueSerializersTest : JsonTestBase() {
@Test
fun testPair() = parametrizedTest { jsonTestingMode ->
testPair(Pair(42, 42), Int.serializer(), Int.serializer(), jsonTestingMode, """{"first":42,"second":42}""")
testPair(
Pair(42, Pair("a", "b")),
Int.serializer(),
serializer(),
jsonTestingMode,
"""{"first":42,"second":{"first":"a","second":"b"}}"""
)
testPair(
Pair(42, null),
Int.serializer(),
Int.serializer().nullable,
jsonTestingMode,
"""{"first":42,"second":null}"""
)
}
private fun <K, V> testPair(
pairInstance: Pair<K, V>,
kSerializer: KSerializer<K>,
vSerializer: KSerializer<V>,
jsonTestingMode: JsonTestingMode,
expectedJson: String
) {
val serializer = PairSerializer(kSerializer, vSerializer)
val json = default.encodeToString(serializer, pairInstance, jsonTestingMode)
assertEquals(expectedJson, json)
val pair = default.decodeFromString(serializer, json, jsonTestingMode)
assertEquals(pairInstance, pair)
}
@Test
fun testTriple() = parametrizedTest { jsonTestingMode ->
testTriple(
Triple(42, 42, "42"),
Int.serializer(),
Int.serializer(),
String.serializer(),
jsonTestingMode,
"""{"first":42,"second":42,"third":"42"}"""
)
testTriple(
Triple(42, Triple(42, "f", 'c'), "42"),
Int.serializer(),
serializer(),
String.serializer(),
jsonTestingMode,
"""{"first":42,"second":{"first":42,"second":"f","third":"c"},"third":"42"}"""
)
testTriple(
Triple(42, null, null),
Int.serializer(),
Int.serializer().nullable,
String.serializer().nullable,
jsonTestingMode,
"""{"first":42,"second":null,"third":null}"""
)
}
private fun <A, B, C> testTriple(
tripleInstance: Triple<A, B, C>,
aSerializer: KSerializer<A>,
bSerializer: KSerializer<B>,
cSerializer: KSerializer<C>,
jsonTestingMode: JsonTestingMode,
expectedJson: String
) {
val serializer = TripleSerializer(aSerializer, bSerializer, cSerializer)
val json = default.encodeToString(serializer, tripleInstance, jsonTestingMode)
assertEquals(expectedJson, json)
val triple = default.decodeFromString(serializer, json, jsonTestingMode)
assertEquals(tripleInstance, triple)
}
class Entry<K, V>(override val key: K, override val value: V) : Map.Entry<K, V> {
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other == null || other !is Map.Entry<*, *>) return false
if (key != other.key) return false
if (value != other.value) return false
return true
}
override fun hashCode(): Int {
var result = key?.hashCode() ?: 0
result = 31 * result + (value?.hashCode() ?: 0)
return result
}
}
@Test
fun testKeyValuePair() = parametrizedTest { jsonTestingMode ->
jvmOnly {
testEntry(Entry(42, 42), Int.serializer(), Int.serializer(), jsonTestingMode, """{"42":42}""")
testEntry(
Entry(42, Entry("a", "b")),
Int.serializer(),
serializer<Map.Entry<String, String>>(),
jsonTestingMode,
"""{"42":{"a":"b"}}"""
)
testEntry(
Entry(42, null),
Int.serializer(),
Int.serializer().nullable,
jsonTestingMode,
"""{"42":null}"""
)
}
}
private inline fun <reified K, reified V> testEntry(
entryInstance: Map.Entry<K, V>,
kSerializer: KSerializer<K>,
vSerializer: KSerializer<V>,
jsonTestingMode: JsonTestingMode,
expectedJson: String
) {
val serializer = MapEntrySerializer(kSerializer, vSerializer)
val json = default.encodeToString(serializer, entryInstance, jsonTestingMode)
assertEquals(expectedJson, json)
val entry = default.decodeFromString(serializer, json, jsonTestingMode)
assertEquals(entryInstance, entry)
}
}
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