From ab4ba44c5213eb5b77b0efcaa15ed261360bdc11 Mon Sep 17 00:00:00 2001
From: wrongwrong <boranti1995@gmail.com>
Date: Sat, 8 Feb 2025 23:17:25 +0900
Subject: [PATCH 1/2] Add test case to serialize Nothing?

wrt #314
---
 .../module/kotlin/test/github/GitHub314.kt    | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/GitHub314.kt

diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/GitHub314.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/GitHub314.kt
new file mode 100644
index 000000000..c01ef0c84
--- /dev/null
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/GitHub314.kt
@@ -0,0 +1,29 @@
+package com.fasterxml.jackson.module.kotlin.test.github
+
+import com.fasterxml.jackson.databind.MapperFeature
+import com.fasterxml.jackson.module.kotlin.jsonMapper
+import com.fasterxml.jackson.module.kotlin.kotlinModule
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class GitHub314 {
+    // Since Nothing? is compiled as a Void, it can be serialized by specifying ALLOW_VOID_VALUED_PROPERTIES
+    data object NothingData {
+        val data: Nothing? = null
+    }
+
+    @Test
+    fun test() {
+        val expected = """{"data":null}"""
+
+        val withoutKotlinModule = jsonMapper { enable(MapperFeature.ALLOW_VOID_VALUED_PROPERTIES) }
+        assertEquals(expected, withoutKotlinModule.writeValueAsString(NothingData))
+
+        val withKotlinModule = jsonMapper {
+            enable(MapperFeature.ALLOW_VOID_VALUED_PROPERTIES)
+            addModule(kotlinModule())
+        }
+
+        assertEquals(expected, withKotlinModule.writeValueAsString(NothingData))
+    }
+}

From 66ef70ebce58d5f906f950b570588e54fccf9aeb Mon Sep 17 00:00:00 2001
From: wrongwrong <boranti1995@gmail.com>
Date: Sat, 8 Feb 2025 23:27:22 +0900
Subject: [PATCH 2/2] Update release notes wrt #914

---
 release-notes/CREDITS-2.x | 1 +
 1 file changed, 1 insertion(+)

diff --git a/release-notes/CREDITS-2.x b/release-notes/CREDITS-2.x
index a408c4e2f..87fb14c78 100644
--- a/release-notes/CREDITS-2.x
+++ b/release-notes/CREDITS-2.x
@@ -18,6 +18,7 @@ Contributors:
 # 2.19.0 (not yet released)
 
 WrongWrong (@k163377)
+* #914: Add test case to serialize Nothing? (for #314)
 * #910: Add default KeyDeserializer for value class
 * #885: Performance improvement of strictNullChecks
 * #884: Changed the base class of MissingKotlinParameterException to InvalidNullException