1 files changed, 105 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/features/PropertyInitializerTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/features/PropertyInitializerTest.kt
new file mode 100644
index 00000000..f33069b8
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/features/PropertyInitializerTest.kt
@@ -0,0 +1,105 @@
+@file:Suppress("MayBeConstant")
+
+package kotlinx.serialization.features
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.Json
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+internal val globalVar: Int = 4
+
+internal fun globalFun(): Int {
+    return 7
+}
+
+internal const val PROPERTY_INITIALIZER_JSON = """{
+    "valProperty": 1,
+    "varProperty": 2,
+    "literalConst": 3,
+    "globalVarRef": 4,
+    "computed": 5,
+    "doubleRef": 6,
+    "globalFun": 7,
+    "globalFunExpr": 8,
+    "itExpr": 9,
+    "transientRefFromProp": 10,
+    "bodyProp": 11,
+    "dependBodyProp": 12,
+    "getterDepend": 13
+}"""
+
+@Suppress("MemberVisibilityCanBePrivate", "unused", "ComplexRedundantLet")
+class PropertyInitializerTest {
+    @Serializable
+    data class InternalClass(
+        val valProperty: Int,
+        var varProperty: Int,
+        val literalConst: Int = 3,
+        val globalVarRef: Int = globalVar,
+        val computed: Int = valProperty + varProperty + 2,
+        val doubleRef: Int = literalConst + literalConst,
+        var globalFun: Int = globalFun(),
+        var globalFunExpr: Int = globalFun() + 1,
+        val itExpr: Int = literalConst.let { it + 6 },
+        @Transient val constTransient: Int = 6,
+        @Transient val serializedRefTransient: Int = varProperty + 1,
+        @Transient val refTransient: Int = serializedRefTransient,
+        val transientRefFromProp: Int = constTransient + 4,
+    ) {
+        val valGetter: Int get() { return 5 }
+        var bodyProp: Int = 11
+        var dependBodyProp: Int = bodyProp + 1
+        var getterDepend: Int = valGetter + 8
+    }
+
+    private val format = Json { encodeDefaults = true; prettyPrint = true }
+
+    data class ExternalClass(
+        val valProperty: Int,
+        var varProperty: Int,
+        val literalConst: Int = 3,
+        val globalVarRef: Int = globalVar,
+        val computed: Int = valProperty + varProperty + 2,
+        val doubleRef: Int = literalConst + literalConst,
+        var globalFun: Int = globalFun(),
+        var globalFunExpr: Int = globalFun() + 1,
+        val itExpr: Int = literalConst.let { it + 6 },
+        @Transient val constTransient: Int = 6,
+        @Transient val serializedRefTransient: Int = varProperty + 1,
+        @Transient val refTransient: Int = serializedRefTransient,
+        val transientRefFromProp: Int = constTransient + 4,
+    ) {
+        val valGetter: Int get() { return 5 }
+        var bodyProp: Int = 11
+        var dependBodyProp: Int = bodyProp + 1
+        var getterDepend: Int = valGetter + 8
+    }
+
+    @Serializer(ExternalClass::class)
+    object ExternalSerializer
+
+    @Test
+    fun testInternalSerializeDefault() {
+        val encoded = format.encodeToString(InternalClass(1, 2))
+        assertEquals(PROPERTY_INITIALIZER_JSON, encoded)
+    }
+
+    @Test
+    fun testInternalDeserializeDefault() {
+        val decoded = format.decodeFromString<InternalClass>("""{"valProperty": 5, "varProperty": 6}""")
+        assertEquals(InternalClass(5, 6), decoded)
+    }
+
+    @Test
+    fun testExternalSerializeDefault() {
+        val encoded = format.encodeToString(ExternalSerializer, ExternalClass(1, 2))
+        assertEquals(PROPERTY_INITIALIZER_JSON, encoded)
+    }
+
+    @Test
+    fun testExternalDeserializeDefault() {
+        val decoded = format.decodeFromString(ExternalSerializer,"""{"valProperty": 5, "varProperty": 6}""")
+        assertEquals(ExternalClass(5, 6), decoded)
+    }
+}