1 files changed, 47 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/test/ContextualTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/test/ContextualTest.kt
new file mode 100644
index 00000000..0b34f1c7
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/test/ContextualTest.kt
@@ -0,0 +1,47 @@
+@file:UseContextualSerialization(ContextualTest.Cont::class)
+
+package kotlinx.serialization.test
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.UseContextualSerialization
+import kotlinx.serialization.descriptors.PrimitiveKind
+import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.modules.SerializersModule
+import kotlinx.serialization.modules.contextual
+
+class ContextualTest {
+    data class Cont(val i: Int)
+
+    @Serializable
+    data class DateHolder(val cont: Cont?)
+
+    object DateSerializer: KSerializer<Cont> {
+        override fun deserialize(decoder: Decoder): Cont {
+            return Cont(decoder.decodeInt())
+        }
+
+        override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("ContSerializer", PrimitiveKind.INT)
+
+        override fun serialize(encoder: Encoder, value: Cont) {
+            encoder.encodeInt(value.i)
+        }
+
+    }
+
+    val module = SerializersModule {
+        contextual(DateSerializer)
+    }
+
+    @kotlin.test.Test
+    fun test() {
+        val json = Json { serializersModule = module }
+
+        println(json.encodeToString(DateHolder(Cont(42))))
+    }
+}