Protected property values, when set by the parent, are now available to subtypes

lib/class_builder.js

@@ -492,7 +492,7 @@ function attachPropInit( prototype, properties, members, cid )
 {
     util.defineSecureProp( prototype, '__initProps', function( inherit )
     {
-        // defaults to false, sid = super identifier
+        // defaults to false
         inherit = !!inherit;
 
         var iid = this.__iid;
@@ -514,8 +514,11 @@ function attachPropInit( prototype, properties, members, cid )
             this, this.___$$vis$$, properties[ 'public' ]
         );
 
-        // if we're inheriting, perform a setup that doesn't include everything
-        // that we don't want (e.g. private properties)
+        // Copies all public and protected members into inst_props and stores
+        // private in a separate object, which adds inst_props to its prototype
+        // chain and is returned. This is stored in a property referenced by the
+        // class id, so that the private members can be swapped on each method
+        // request, depending on calling context.
         var vis = this.___$$vis$$[ cid ] = propobj.setup(
             inst_props, properties, members
         );

lib/propobj.js

@@ -56,6 +56,11 @@ exports.setup = function( dest, properties, methods )
         obj_ctor.prototype = dest;
 
         obj = new obj_ctor();
+
+        // all private protected proxies need to be proxied from the private
+        // object (which will be passed as the context) to the object containing
+        // protected values
+        exports.createPropProxy( dest, obj, properties[ 'protected' ] );
     }
 
     // initialize each of the properties for this instance to

test/test-class-visibility.js

@@ -692,3 +692,36 @@ var common    = require( './common' ),
     );
 } )();
 
+
+/**
+ * There was an issue where the private property object was not proxying values
+ * to the true protected values. This would mean that when the parent
+ * initialized protected values, those values would be unavailable to the
+ * subtype. Instead, the value available to the subtype was the value that was
+ * assigned as the default value in the class definition.
+ */
+( function testProtectedValuesAreAvailableToSubtypesWhenSetByParentMethod()
+{
+    var expected = 5,
+        result   = Class(
+        {
+            'protected val': 0,
+
+            'public __construct': function()
+            {
+                this.val = expected;
+            },
+        } ).extend(
+        {
+            'public getVal': function()
+            {
+                return this.val;
+            },
+        } )().getVal();
+
+    assert.equal( result, expected,
+        "Subtypes should have acess to protected properties values set by " +
+        "super methods"
+    );
+} )();
+