1 files changed, 21 insertions, 0 deletions
diff --git a/runtime/commonTest/src/kotlinx/serialization/cbor/CborRootLevelNullsTest.kt b/runtime/commonTest/src/kotlinx/serialization/cbor/CborRootLevelNullsTest.kt
new file mode 100644
index 00000000..c9029ac1
--- /dev/null
+++ b/runtime/commonTest/src/kotlinx/serialization/cbor/CborRootLevelNullsTest.kt
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2017-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization.cbor
+
+import kotlinx.serialization.*
+import kotlinx.serialization.internal.*
+import kotlin.test.*
+
+class CborRootLevelNullsTest {
+    @Serializable
+    data class Simple(val a: Int = 42)
+
+    @Test
+    fun testNull() {
+        val obj: Simple? = null
+        val content = (Cbor as BinaryFormat).dump(makeNullable(Simple.serializer()), obj)
+        assertTrue(content.contentEquals(byteArrayOf(0xf6.toByte())))
+    }
+}