Add unit test for r11818.

test/cctest/test-decls.cc

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 54 matching lines @@
   int set_count() const { return set_count_; }
   int query_count() const { return query_count_; }
 
  protected:
   virtual v8::Handle<Value> Get(Local<String> key);
   virtual v8::Handle<Value> Set(Local<String> key, Local<Value> value);
   virtual v8::Handle<Integer> Query(Local<String> key);
 
   void InitializeIfNeeded();
 
+  // Perform optional initialization steps on the context after it has
+  // been created. Defaults to none but may be overwritten.
+  virtual void PostInitializeContext(Handle<Context> context) {}
+
   // Get the holder for the interceptor. Default to the instance template
   // but may be overwritten.
   virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
     return function->InstanceTemplate();
   }
 
   // The handlers are called as static functions that forward
   // to the instance specific virtual methods.
   static v8::Handle<Value> HandleGet(Local<String> key,
                                      const AccessorInfo& info);
@@ skipping 28 matching lines @@
   Local<FunctionTemplate> function = FunctionTemplate::New();
   Local<Value> data = External::New(this);
   GetHolder(function)->SetNamedPropertyHandler(&HandleGet,
                                                &HandleSet,
                                                &HandleQuery,
                                                0, 0,
                                                data);
   context_ = Context::New(0, function->InstanceTemplate(), Local<Value>());
   context_->Enter();
   is_initialized_ = true;
+  PostInitializeContext(context_);
 }
 
 
 void DeclarationContext::Check(const char* source,
                                int get, int set, int query,
                                Expectations expectations,
                                v8::Handle<Value> value) {
   InitializeIfNeeded();
   // A retry after a GC may pollute the counts, so perform gc now
   // to avoid that.
@@ skipping 396 matching lines @@
   { ExistsInPrototypeContext context;
     context.Check("this.x = 87; this.x",
                   0,
                   0,
                   0,
                   EXPECT_RESULT, Number::New(87));
   }
 
   { ExistsInPrototypeContext context;
     context.Check("var x; x",
-                  0,  // get
                   0,
-                  0,  // declaration
+                  0,
+                  0,
                   EXPECT_RESULT, Undefined());
   }
 
   { ExistsInPrototypeContext context;
     context.Check("var x = 0; x",
                   0,
                   0,
-                  0,  // declaration
+                  0,
                   EXPECT_RESULT, Number::New(0));
   }
 
   { ExistsInPrototypeContext context;
     context.Check("const x; x",
                   0,
                   0,
-                  0,  // declaration
+                  0,
                   EXPECT_RESULT, Undefined());
   }
 
   { ExistsInPrototypeContext context;
     context.Check("const x = 0; x",
                   0,
                   0,
-                  0,  // declaration
+                  0,
                   EXPECT_RESULT, Number::New(0));
   }
 }
 
 
 
 class AbsentInPrototypeContext: public DeclarationContext {
  protected:
   virtual v8::Handle<Integer> Query(Local<String> key) {
     // Let it seem that the property is absent in the prototype object.
     return Handle<Integer>();
   }
 
   // Use the prototype as the holder for the interceptors.
   virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
     return function->PrototypeTemplate();
   }
 };
 
 
 TEST(AbsentInPrototype) {
   i::FLAG_es52_globals = true;
   HandleScope scope;
 
   { AbsentInPrototypeContext context;
     context.Check("if (false) { var x = 0; }; x",
                   0,
                   0,
-                  0,  // declaration
+                  0,
                   EXPECT_RESULT, Undefined());
   }
 }
+
+
+
+class ExistsInHiddenPrototypeContext: public DeclarationContext {
+ public:
+  ExistsInHiddenPrototypeContext() {
+    hidden_proto_ = FunctionTemplate::New();
+    hidden_proto_->SetHiddenPrototype(true);
+  }
+
+ protected:
+  virtual v8::Handle<Integer> Query(Local<String> key) {
+    // Let it seem that the property exists in the hidden prototype object.
+    return Integer::New(v8::None);
+  }
+
+  // Install the hidden prototype after the global object has been created.
+  virtual void PostInitializeContext(Handle<Context> context) {
+    Local<Object> global_object = context->Global();
+    Local<Object> hidden_proto = hidden_proto_->GetFunction()->NewInstance();
+    context->DetachGlobal();
+    context->Global()->SetPrototype(hidden_proto);
+    context->ReattachGlobal(global_object);
+  }
+
+  // Use the hidden prototype as the holder for the interceptors.
+  virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
+    return hidden_proto_->InstanceTemplate();
+  }
+
+ private:
+  Local<FunctionTemplate> hidden_proto_;
+};
+
+
+TEST(ExistsInHiddenPrototype) {
+  i::FLAG_es52_globals = true;
+  HandleScope scope;
+
+  { ExistsInHiddenPrototypeContext context;
+    context.Check("var x; x",
+                  1,  // access
+                  0,
+                  2,  // declaration + initialization
+                  EXPECT_EXCEPTION);  // x is not defined!
+  }
+
+  { ExistsInHiddenPrototypeContext context;
+    context.Check("var x = 0; x",
+                  1,  // access
+                  1,  // initialization
+                  2,  // declaration + initialization
+                  EXPECT_RESULT, Number::New(0));
+  }
+
+  { ExistsInHiddenPrototypeContext context;
+    context.Check("function x() { }; x",
+                  0,
+                  0,
+                  0,
+                  EXPECT_RESULT);
+  }
+
+  // TODO(mstarzinger): The semantics of global const is vague.
+  { ExistsInHiddenPrototypeContext context;
+    context.Check("const x; x",
+                  0,
+                  0,
+                  1,  // (re-)declaration
+                  EXPECT_RESULT, Undefined());
+  }
+
+  // TODO(mstarzinger): The semantics of global const is vague.
+  { ExistsInHiddenPrototypeContext context;
+    context.Check("const x = 0; x",
+                  0,
+                  0,
+                  1,  // (re-)declaration
+                  EXPECT_RESULT, Number::New(0));
+  }
+}