1 files changed, 36 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/features/DefaultPolymorphicSerializerTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/features/DefaultPolymorphicSerializerTest.kt
new file mode 100644
index 00000000..9d35a290
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/features/DefaultPolymorphicSerializerTest.kt
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017-2022 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.*
+import kotlinx.serialization.modules.*
+import kotlin.test.*
+
+class DefaultPolymorphicSerializerTest : JsonTestBase() {
+
+    @Serializable
+    abstract class Project {
+        abstract val name: String
+    }
+
+    @Serializable
+    data class DefaultProject(override val name: String, val type: String): Project()
+
+    val module = SerializersModule {
+        polymorphic(Project::class) {
+            defaultDeserializer { DefaultProject.serializer() }
+        }
+    }
+
+    private val json = Json { serializersModule = module }
+
+    @Test
+    fun test() = parametrizedTest {
+        assertEquals(
+            DefaultProject("example", "unknown"),
+            json.decodeFromString<Project>(""" {"type":"unknown","name":"example"}""", it))
+    }
+
+}