1 files changed, 46 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonListPolymorphismTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonListPolymorphismTest.kt
new file mode 100644
index 00000000..5722e8df
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonListPolymorphismTest.kt
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2017-2018 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.Polymorphic
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonTestBase
+import kotlin.test.Test
+import kotlin.test.assertFails
+
+class JsonListPolymorphismTest : JsonTestBase() {
+
+    @Serializable
+    internal data class ListWrapper(val list: List<@Polymorphic InnerBase>)
+
+    @Test
+    fun testPolymorphicValues() = assertJsonFormAndRestored(
+        ListWrapper.serializer(),
+        ListWrapper(listOf(InnerImpl(1), InnerImpl2(2))),
+        """{"list":[""" +
+                """{"type":"kotlinx.serialization.json.polymorphic.InnerImpl","field":1,"str":"default","nullable":null},""" +
+                """{"type":"kotlinx.serialization.json.polymorphic.InnerImpl2","field":2}]}""",
+        polymorphicRelaxedJson)
+
+    @Serializable
+    internal data class ListNullableWrapper(val list: List<@Polymorphic InnerBase?>)
+
+    @Test
+    fun testPolymorphicNullableValues() = assertJsonFormAndRestored(
+        ListNullableWrapper.serializer(),
+        ListNullableWrapper(listOf(InnerImpl(1), null)),
+        """{"list":[""" +
+                """{"type":"kotlinx.serialization.json.polymorphic.InnerImpl","field":1,"str":"default","nullable":null},""" +
+                "null]}",
+        polymorphicRelaxedJson)
+
+    @Test
+    fun testPolymorphicNullableValuesWithNonNullSerializerFails() =
+        parametrizedTest { jsonTestingMode ->
+            val wrapper = ListNullableWrapper(listOf(InnerImpl(1), null))
+            val serialized = polymorphicRelaxedJson.encodeToString(ListNullableWrapper.serializer(), wrapper, jsonTestingMode)
+            assertFails { polymorphicRelaxedJson.decodeFromString(ListWrapper.serializer(), serialized, jsonTestingMode) }
+        }
+}