ES6 Unscopables

test/cctest/test-unscopables-hidden-prototype.cc

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdlib.h>
+
+#include "src/v8.h"
+#include "test/cctest/cctest.h"
+
+namespace {
+
+
+static void Cleanup() {
+  CompileRun(
+      "delete object.x;"
+      "delete hidden_prototype.x;"
+      "delete object[Symbol.unscopables];"
+      "delete hidden_prototype[Symbol.unscopables];");
+}
+
+
+TEST(Unscopables) {
+  i::FLAG_harmony_unscopables = true;
+
+  LocalContext context;
+  v8::Isolate* isolate = context->GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+
+  v8::Local<v8::FunctionTemplate> t0 = v8::FunctionTemplate::New(isolate);
+  v8::Local<v8::FunctionTemplate> t1 = v8::FunctionTemplate::New(isolate);
+  t0->SetHiddenPrototype(true);
+  t1->Inherit(t0);
+
+  v8::Local<v8::Object> object = t1->GetFunction()->NewInstance();
+  v8::Local<v8::Object> hidden_prototype =
+      v8::Local<v8::Object>::Cast(object->GetPrototype());
+
+  context->Global()->Set(v8_str("object"), object);
+  context->Global()->Set(v8_str("hidden_prototype"), hidden_prototype);
+
+  CHECK_EQ(1, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "object.x = 1;"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+
+  Cleanup();
+  CHECK_EQ(2, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "hidden_prototype.x = 2;"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+
+  Cleanup();
+  CHECK_EQ(0, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "object.x = 3;"
+                  "object[Symbol.unscopables] = {x: true};"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+
+  Cleanup();
+  CHECK_EQ(0, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "hidden_prototype.x = 4;"
+                  "hidden_prototype[Symbol.unscopables] = {x: true};"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+
+  Cleanup();
+  CHECK_EQ(5, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "object.x = 5;"
+                  "hidden_prototype[Symbol.unscopables] = {x: true};"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+
+  Cleanup();
+  CHECK_EQ(6, CompileRun(
+                  "var result;"
+                  "var x = 0;"
+                  "hidden_prototype.x = 6;"
+                  "object[Symbol.unscopables] = {x: true};"
+                  "with (object) {"
+                  "  result = x;"
+                  "}"
+                  "result")->Int32Value());
+}
+}