Add library classes for delegated properties

libraries/stdlib/test/properties/delegation/DelegationTest.kt

@@ -0,0 +1,64 @@
+package test.properties.delegation
+
+import junit.framework.TestCase
+import kotlin.test.*
+import kotlin.properties.*
+import kotlin.properties.delegation.*
+import kotlin.properties.delegation.lazy.*
+
+trait WithBox {
+    fun box(): String
+}
+
+abstract class DelegationTestBase: TestCase() {
+    fun doTest(klass: WithBox) {
+        assertEquals("OK", klass.box())
+    }
+}
+
+class DelegationTest(): DelegationTestBase() {
+    fun testNotNullVar() {
+        doTest(TestNotNullVar("a", "b"))
+    }
+
+    fun testObservableProperty() {
+        doTest(TestObservableProperty())
+    }
+}
+
+public class TestNotNullVar<T>(val a1: String, val b1: T): WithBox {
+    var a: String by NotNullVar<String>()
+    var b by NotNullVar<T>()
+
+    override fun box(): String {
+        a = a1
+        b = b1
+        if (a != "a") return "fail: a shouuld be a, but was $a"
+        if (b != "b") return "fail: b should be b, but was $b"
+        return "OK"
+    }
+}
+
+class TestObservableProperty: WithBox, ChangeSupport() {
+
+    var b by property(init = 2)
+    var c by property(3)
+
+    override fun box(): String {
+        var result = false
+        addChangeListener("b", object: ChangeListener {
+            public override fun onPropertyChange(event: ChangeEvent) {
+                result = true
+            }
+        })
+        addChangeListener("c", object: ChangeListener {
+            public override fun onPropertyChange(event: ChangeEvent) {
+                result = false
+            }
+        })
+        b = 4
+        if (b != 4) return "fail: b != 4"
+        if (!result) return "fail: result should be true"
+        return "OK"
+    }
+}