[Serialization] Reorganize module structure

plugins/kotlinx-serialization/testData/firMembers/defaultProperties.kt

@@ -0,0 +1,28 @@
+// WITH_STDLIB
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+
+@Serializable
+data class SomeClass(val ctor: Int = 42, val ctorDependent: Int = ctor + 1) {
+    var body: String = ""
+
+    var bodyDependent = ctor + 2
+}
+
+fun test(targetString: String): String {
+    val json = Json { encodeDefaults = true }
+    val c = SomeClass(1).apply { body = "x" }
+    val s = json.encodeToString(SomeClass.serializer(), c)
+    if (s != targetString) return s
+    val i2 = json.decodeFromString(SomeClass.serializer(), "{}")
+    if (i2.ctor != 42) return "Incorrect default ctor"
+    if (i2.ctorDependent != 43) return "Incorrect default ctorDependent"
+    if (i2.body != "") return "Incorrect default body"
+    if (i2.bodyDependent != 44) return "Incorrect default bodyDependent"
+    return "OK"
+}
+
+fun box(): String {
+    return test("""{"ctor":1,"ctorDependent":2,"body":"x","bodyDependent":3}""")
+}