1 files changed, 72 insertions, 0 deletions
diff --git a/runtime/commonTest/src/kotlinx/serialization/features/SerializableWithTest.kt b/runtime/commonTest/src/kotlinx/serialization/features/SerializableWithTest.kt
new file mode 100644
index 00000000..ee373e7a
--- /dev/null
+++ b/runtime/commonTest/src/kotlinx/serialization/features/SerializableWithTest.kt
@@ -0,0 +1,72 @@
+package kotlinx.serialization.features
+
+import kotlinx.serialization.*
+import kotlinx.serialization.internal.IntDescriptor
+import kotlinx.serialization.json.Json
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+object MultiplyingIntSerializer : KSerializer<Int> {
+    override val descriptor: SerialDescriptor
+        get() = IntDescriptor
+
+    override fun deserialize(decoder: Decoder): Int {
+        return decoder.decodeInt() / 2
+    }
+
+    override fun serialize(encoder: Encoder, obj: Int) {
+        encoder.encodeInt(obj * 2)
+    }
+}
+
+object DividingIntSerializer : KSerializer<Int> {
+    override val descriptor: SerialDescriptor
+        get() = IntDescriptor
+
+    override fun deserialize(decoder: Decoder): Int {
+        return decoder.decodeInt() * 2
+    }
+
+    override fun serialize(encoder: Encoder, obj: Int) {
+        encoder.encodeInt(obj / 2)
+    }
+}
+
+@Serializable(with = DividingIntHolderSerializer::class)
+data class IntHolder(val data: Int)
+
+@Serializer(IntHolder::class)
+object MultiplyingIntHolderSerializer {
+    override fun deserialize(decoder: Decoder): IntHolder {
+        return IntHolder(decoder.decodeInt() / 2)
+    }
+
+    override fun serialize(encoder: Encoder, obj: IntHolder) {
+        encoder.encodeInt(obj.data * 2)
+    }
+}
+
+@Serializer(IntHolder::class)
+object DividingIntHolderSerializer {
+    override fun deserialize(decoder: Decoder): IntHolder {
+        return IntHolder(decoder.decodeInt() * 2)
+    }
+
+    override fun serialize(encoder: Encoder, obj: IntHolder) {
+        encoder.encodeInt(obj.data / 2)
+    }
+}
+
+@Serializable
+data class Carrier(
+    @Serializable(with = MultiplyingIntHolderSerializer::class) val a: IntHolder,
+    @Serializable(with = MultiplyingIntSerializer::class) val i: Int
+)
+
+class SerializableWithTest {
+    @Test
+    fun testOnProperties() {
+        val str = Json.stringify(Carrier.serializer(), Carrier(IntHolder(42), 2))
+        assertEquals("""{"a":84,"i":4}""", str)
+    }
+}