1 files changed, 63 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/features/SealedPolymorphismTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/features/SealedPolymorphismTest.kt
new file mode 100644
index 00000000..4cc289a9
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/features/SealedPolymorphismTest.kt
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2017-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization.features
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.modules.*
+import kotlinx.serialization.test.assertStringFormAndRestored
+import kotlin.test.Test
+
+class SealedPolymorphismTest {
+
+    @Serializable
+    data class FooHolder(
+        val someMetadata: Int,
+        val payload: List<@Polymorphic Foo>
+    )
+
+    @Serializable
+    @SerialName("Foo")
+    sealed class Foo {
+        @Serializable
+        @SerialName("Bar")
+        data class Bar(val bar: Int) : Foo()
+        @Serializable
+        @SerialName("Baz")
+        data class Baz(val baz: String) : Foo()
+    }
+
+    val sealedModule = SerializersModule {
+        polymorphic(Foo::class) {
+            subclass(Foo.Bar.serializer())
+            subclass(Foo.Baz.serializer())
+        }
+    }
+
+    val json = Json { serializersModule = sealedModule }
+
+    @Test
+    fun testSaveSealedClassesList() {
+        assertStringFormAndRestored(
+            """{"someMetadata":42,"payload":[
+            |{"type":"Bar","bar":1},
+            |{"type":"Baz","baz":"2"}]}""".trimMargin().replace("\n", ""),
+            FooHolder(42, listOf(Foo.Bar(1), Foo.Baz("2"))),
+            FooHolder.serializer(),
+            json,
+            printResult = true
+        )
+    }
+
+    @Test
+    fun testCanSerializeSealedClassPolymorphicallyOnTopLevel() {
+        assertStringFormAndRestored(
+            """{"type":"Bar","bar":1}""",
+            Foo.Bar(1),
+            PolymorphicSerializer(Foo::class),
+            json
+        )
+    }
+}