1 files changed, 44 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonPolymorphicObjectTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonPolymorphicObjectTest.kt
new file mode 100644
index 00000000..e47f5790
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonPolymorphicObjectTest.kt
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2017-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization.json.polymorphic
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+import kotlinx.serialization.modules.*
+import kotlin.test.*
+
+class JsonPolymorphicObjectTest : JsonTestBase() {
+
+    @Serializable
+    data class Holder(@Polymorphic val a: Any)
+
+    @Serializable
+    @SerialName("MyObject")
+    object MyObject {
+        @Suppress("unused")
+        val unused = 42
+    }
+
+    val json = Json {
+        serializersModule = SerializersModule {
+            polymorphic(Any::class) {
+                subclass(MyObject::class, MyObject.serializer()) // JS bug workaround
+            }
+        }
+    }
+
+    @Test
+    fun testRegularPolymorphism() {
+        assertJsonFormAndRestored(Holder.serializer(), Holder(MyObject), """{"a":{"type":"MyObject"}}""", json)
+    }
+
+    @Test
+    fun testArrayPolymorphism() {
+        val json = Json(from = json) {
+            useArrayPolymorphism = true
+        }
+        assertJsonFormAndRestored(Holder.serializer(), Holder(MyObject), """{"a":["MyObject",{}]}""", json)
+    }
+}