Add default value tests for setting / getting the managed property

Author: abhinayagarwal

modules/javafx.graphics/src/test/java/test/javafx/scene/NodeTest.java

@@ -1090,6 +1090,34 @@ public void settingVisibleThroughPropertyShouldAffectBothGetterAndProperty() {
         assertFalse(node.visibleProperty().get());
     }
 
+    @Test
+    public void testDefaultValueForManagedIsTrueWhenReadFromGetter() {
+        final Node node = new Rectangle();
+        assertTrue(node.isManaged());
+    }
+
+    @Test
+    public void testDefaultValueForManagedIsTrueWhenReadFromProperty() {
+        final Node node = new Rectangle();
+        assertTrue(node.managedProperty().get());
+    }
+
+    @Test
+    public void settingManagedThroughSetterShouldAffectBothGetterAndProperty() {
+        final Node node = new Rectangle();
+        node.setManaged(false);
+        assertFalse(node.isManaged());
+        assertFalse(node.managedProperty().get());
+    }
+
+    @Test
+    public void settingManagedThroughPropertyShouldAffectBothGetterAndProperty() {
+        final Node node = new Rectangle();
+        node.managedProperty().set(false);
+        assertFalse(node.isManaged());
+        assertFalse(node.managedProperty().get());
+    }
+
     @Test
     public void testDefaultStyleIsEmptyString() {
         final Node node = new Rectangle();