Expose JSON stringifier through V8 API

test/cctest/test-api.cc

 // Copyright 2012 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
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   v8::HandleScope scope(isolate);
   Local<FunctionTemplate> templ = FunctionTemplate::New(isolate,
                                                         DummyCallHandler);
   CompileRun("for (var i = 0; i < 128; i++) Object.prototype[i] = 0;");
   Local<Function> function =
       templ->GetFunction(context.local()).ToLocalChecked();
   CHECK(!function.IsEmpty());
   CHECK(function->IsFunction());
 }
 
+THREADED_TEST(JSONParseObjectWithContext) {
+  LocalContext context;
+  HandleScope scope(context->GetIsolate());
+  Local<Value> obj =
+      v8::JSON::Parse(context.local(), v8_str("{\"x\":42}")).ToLocalChecked();
+  Local<Object> global = context->Global();
+  global->Set(context.local(), v8_str("obj"), obj).FromJust();
+  ExpectString("JSON.stringify(obj)", "{\"x\":42}");
+}
 
 THREADED_TEST(JSONParseObject) {
   LocalContext context;
   HandleScope scope(context->GetIsolate());
   Local<Value> obj =
       v8::JSON::Parse(context->GetIsolate(), v8_str("{\"x\":42}"))
           .ToLocalChecked();
   Local<Object> global = context->Global();
   global->Set(context.local(), v8_str("obj"), obj).FromJust();
   ExpectString("JSON.stringify(obj)", "{\"x\":42}");
 }
 
 
 THREADED_TEST(JSONParseNumber) {
   LocalContext context;
   HandleScope scope(context->GetIsolate());
   Local<Value> obj =
       v8::JSON::Parse(context->GetIsolate(), v8_str("42")).ToLocalChecked();
   Local<Object> global = context->Global();
   global->Set(context.local(), v8_str("obj"), obj).FromJust();
   ExpectString("JSON.stringify(obj)", "42");
 }
 
+THREADED_TEST(JSONStringifyObject) {
+  LocalContext context;
+  HandleScope scope(context->GetIsolate());
+  Local<Value> value =
+      v8::JSON::Parse(context->GetIsolate(), v8_str("{\"x\":42}"))
+          .ToLocalChecked();
+  Local<Object> obj = value->ToObject(context.local()).ToLocalChecked();
+  Local<Object> global = context->Global();
+  global->Set(context.local(), v8_str("obj"), obj).FromJust();
+  Local<String> json =
+      v8::JSON::Stringify(context->GetIsolate(), obj).ToLocalChecked();
+  v8::String::Utf8Value utf8(json);
+  ExpectString("JSON.stringify(obj)", *utf8);
+}
 
 #if V8_OS_POSIX && !V8_OS_NACL
 class ThreadInterruptTest {
  public:
   ThreadInterruptTest() : sem_(0), sem_value_(0) { }
   ~ThreadInterruptTest() {}
 
   void RunTest() {
     InterruptThread i_thread(this);
     i_thread.Start();
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   }
   delete garbage;
   // Check that moderate memory pressure notification sets GC into memory
   // optimizing mode.
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kModerate);
   CHECK(CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
   // Check that disabling memory pressure returns GC into normal mode.
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kNone);
   CHECK(!CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
 }