1 files changed, 48 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/features/inline/EncodeInlineElementTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/features/inline/EncodeInlineElementTest.kt
new file mode 100644
index 00000000..aa4866f4
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/features/inline/EncodeInlineElementTest.kt
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization.features.inline
+
+import kotlinx.serialization.*
+import kotlinx.serialization.builtins.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+import kotlinx.serialization.test.*
+import kotlin.test.*
+
+@Serializable(WithUnsignedSerializer::class)
+data class WithUnsigned(val u: UInt)
+
+object WithUnsignedSerializer : KSerializer<WithUnsigned> {
+    override fun serialize(encoder: Encoder, value: WithUnsigned) {
+        val ce = encoder.beginStructure(descriptor)
+        ce.encodeInlineElement(descriptor, 0).encodeInt(value.u.toInt())
+        ce.endStructure(descriptor)
+    }
+
+    override fun deserialize(decoder: Decoder): WithUnsigned {
+        val cd = decoder.beginStructure(descriptor)
+        var u: UInt = 0.toUInt()
+        loop@ while (true) {
+            u = when (val i = cd.decodeElementIndex(descriptor)) {
+                0 -> cd.decodeInlineElement(descriptor, i).decodeInt().toUInt()
+                else -> break@loop
+            }
+        }
+        cd.endStructure(descriptor)
+        return WithUnsigned(u)
+    }
+
+    override val descriptor: SerialDescriptor = buildClassSerialDescriptor("WithUnsigned") {
+        element("u", UInt.serializer().descriptor)
+    }
+}
+
+class EncodeInlineElementTest {
+    @Test
+    fun wrapper() {
+        val w = WithUnsigned(Int.MAX_VALUE.toUInt() + 1.toUInt())
+        assertStringFormAndRestored<WithUnsigned>("""{"u":2147483648}""", w, WithUnsignedSerializer, printResult = true)
+    }
+}