Tests for fixes for #KT-62522 and #KT-62215 (#2474)

Author: sandwwraith

formats/json-tests/commonTest/src/kotlinx/serialization/GenericOverrideTest.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2017-2024 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization
+
+import kotlinx.serialization.builtins.serializer
+import kotlinx.serialization.json.*
+import kotlin.test.Test
+
+class GenericOverrideTest: JsonTestBase() {
+
+    @Serializable
+    sealed class TypedSealedClass<T>(val a: T) {
+        @Serializable
+        @SerialName("child")
+        data class Child(val y: Int) : TypedSealedClass<String>("10") {
+            override fun toString(): String = "Child($a, $y)"
+        }
+    }
+
+    @Test
+    fun testAinChildSerializesAsString() = parametrizedTest { mode ->
+        val encodedChild = """{"a":"10","y":42}"""
+        assertJsonFormAndRestored(TypedSealedClass.Child.serializer(), TypedSealedClass.Child(42), encodedChild)
+    }
+
+    @Test
+    fun testSerializeAsBaseClass() = parametrizedTest { mode ->
+        val encodedChild = """{"type":"child","a":"10","y":42}"""
+        assertJsonFormAndRestored(TypedSealedClass.serializer(String.serializer()), TypedSealedClass.Child(42), encodedChild)
+    }
+}

integration-test/src/commonMain/kotlin/sample/MultiFileHierarchyModuleA.kt

@@ -28,3 +28,15 @@ abstract class NotInConstructorBase {
     val b = "val b"
     val a = "val a"
 }
+
+@Serializable
+open class GenericBox<E> {
+    var contents: Map<String, E>? = null
+}
+
+// From #KT-43910
+@Serializable
+open class ValidatableValue<T : Any, V: Any>(
+    var value: T? = null,
+    var error: V? = null,
+)

integration-test/src/commonTest/kotlin/sample/MultiFileHierarchyModuleB.kt

@@ -60,3 +60,17 @@ class NotInConstructorTest : NotInConstructorBase() {
         return a.hashCode() * 31 + b.hashCode() * 31 + c.hashCode()
     }
 }
+
+@Serializable
+data class TestData(val field: String)
+
+
+@Serializable
+class TestClass(): GenericBox<TestData>()
+
+@Serializable
+class Email<E : Any> : ValidatableValue<String, E>() {
+    override fun toString(): String {
+        return "Email($value, $error)"
+    }
+}

integration-test/src/commonTest/kotlin/sample/MultiFileHierarchyTest.kt

@@ -4,6 +4,7 @@
 
 package sample
 
+import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.modules.SerializersModule
 import kotlinx.serialization.modules.polymorphic
@@ -73,4 +74,23 @@ class AbstractBaseTest {
     fun testPropertiesNotInConstructor() {
         assertStringFormAndRestored("""{"b":"val b","a":"val a","c":"val c"}""", NotInConstructorTest(), NotInConstructorTest.serializer())
     }
+
+    @Test
+    fun testDoubleGeneric() {
+        val email = Email<Int>().apply {
+            value = "foo"
+            error = 1
+        }
+        val encodedEmail = Json.encodeToString(email)
+        assertEquals("""{"value":"foo","error":1}""", encodedEmail)
+        assertEquals("Email(foo, 1)", Json.decodeFromString<Email<Int>>(encodedEmail).toString())
+    }
+
+    @Test
+    fun test() {
+        val t = TestClass().also { it.contents = mapOf("a" to TestData("data")) }
+        val s = Json.encodeToString(t)
+        assertEquals("""{"contents":{"a":{"field":"data"}}}""", s)
+        assertEquals("data", Json.decodeFromString<TestClass>(s).contents?.get("a")?.field)
+    }
 }