Fix Opal.alias_native

elia · elia · commit b88a94a7f07b · 2015-02-25T16:44:29.000+01:00
…after has been cleaned up by @meh ;)
diff --git a/opal/corelib/runtime.js b/opal/corelib/runtime.js
@@ -1174,12 +1174,12 @@
     return obj;
   };
 
-  Opal.alias_native = function(obj, name, old) {
+  Opal.alias_native = function(obj, name, native_name) {
     var id   = '$' + name,
-        body = obj.$$proto['$' + old];
+        body = obj.$$proto[native_name];
 
     if (typeof(body) !== "function" || body.$$stub) {
-      throw Opal.NameError.$new("undefined method `" + old + "' for class `" + obj.$name() + "'")
+      throw Opal.NameError.$new("undefined native method `" + native_name + "' for class `" + obj.$name() + "'")
     }
 
     Opal.defn(obj, id, wrap(body));
diff --git a/spec/opal/stdlib/native/alias_native_spec.rb b/spec/opal/stdlib/native/alias_native_spec.rb
@@ -25,3 +25,12 @@
     }.new(`{ a: 42 }`).a.should == 42
   end
 end
+
+describe 'Module#alias_native' do
+  it 'exposes a native method' do
+    klass = Class.new
+    `klass.$$proto.a = function() { return 123 }`
+    klass.alias_native :a, :a
+    klass.new.a.should == 123
+  end
+end
