1 files changed, 96 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonProhibitedPolymorphicKindsTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonProhibitedPolymorphicKindsTest.kt
new file mode 100644
index 00000000..7a825395
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/json/polymorphic/JsonProhibitedPolymorphicKindsTest.kt
@@ -0,0 +1,96 @@
+/*
+ * 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 JsonProhibitedPolymorphicKindsTest : JsonTestBase() {
+
+    @Serializable
+    sealed class Base {
+        @Serializable
+        class Impl(val data: Int) : Base()
+    }
+
+    @Serializable
+    enum class MyEnum
+
+    @Test
+    fun testSealedSubclass() {
+        assertFailsWith<IllegalArgumentException> {
+            Json(true) {
+                subclass(Base::class)
+            }
+        }
+        assertFailsWith<IllegalArgumentException> {
+            Json(false) {
+                subclass(Base::class)
+            }
+        }
+    }
+
+    @Test
+    fun testPrimitive() {
+        assertFailsWith<IllegalArgumentException> {
+            Json(false) {
+                subclass(Int::class)
+            }
+        }
+
+        // Doesn't fail
+        Json(true) {
+            subclass(Int::class)
+        }
+    }
+
+    @Test
+    fun testEnum() {
+        assertFailsWith<IllegalArgumentException> {
+            Json(false) {
+                subclass(MyEnum::class)
+            }
+        }
+
+        Json(true) {
+            subclass(MyEnum::class)
+        }
+    }
+
+    @Test
+    fun testStructures() {
+        assertFailsWith<IllegalArgumentException> {
+            Json(false) {
+                subclass(serializer<Map<Int, Int>>())
+            }
+        }
+
+        assertFailsWith<IllegalArgumentException> {
+            Json(false) {
+                subclass(serializer<List<Int>>())
+            }
+        }
+
+        Json(true) {
+            subclass(serializer<List<Int>>())
+        }
+
+
+        Json(true) {
+            subclass(serializer<Map<Int, Int>>())
+        }
+    }
+
+    private fun Json(useArrayPolymorphism: Boolean, builderAction: PolymorphicModuleBuilder<Any>.() -> Unit) = Json {
+        this.useArrayPolymorphism = useArrayPolymorphism
+        serializersModule = SerializersModule {
+            polymorphic(Any::class) {
+                builderAction()
+            }
+        }
+    }
+}