/* * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license * that can be found in the LICENSE file. */ package codegen.delegatedProperty.observable import kotlin.test.* import kotlin.properties.Delegates class User { var name: String by Delegates.observable("") { prop, old, new -> println("$old -> $new") } } @Test fun runTest() { val user = User() user.name = "first" user.name = "second" }