[api] Expose FunctionCallbackInfo::NewTarget

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
@@ skipping 13203 matching lines @@
   CHECK(context->Global()
             ->Set(context.local(), v8_str("f"),
                   templ->GetFunction(context.local()).ToLocalChecked())
             .FromJust());
   Local<Value> value = v8_compile("f()")->Run(context.local()).ToLocalChecked();
   CHECK(!value->BooleanValue(context.local()).FromJust());
   value = v8_compile("new f()")->Run(context.local()).ToLocalChecked();
   CHECK(value->BooleanValue(context.local()).FromJust());
 }
 
+static void NewTargetHandler(const v8::FunctionCallbackInfo<v8::Value>& args) {
+  ApiTestFuzzer::Fuzz();
+  args.GetReturnValue().Set(args.NewTarget());
+}
+
+THREADED_TEST(NewTargetHandler) {
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+
+  // Function template with call handler.
+  Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(isolate);
+  templ->SetCallHandler(NewTargetHandler);
+
+  LocalContext context;
+
+  Local<Function> function =
+      templ->GetFunction(context.local()).ToLocalChecked();
+  CHECK(context->Global()
+            ->Set(context.local(), v8_str("f"), function)
+            .FromJust());
+  Local<Value> value = CompileRun("f()");
+  CHECK(value->IsUndefined());
+  value = CompileRun("new f()");
+  CHECK(value->IsFunction());
+  CHECK(value == function);
+  Local<Value> subclass = CompileRun("var g = class extends f { }; g");
+  CHECK(subclass->IsFunction());
+  value = CompileRun("new g()");
+  CHECK(value->IsFunction());
+  CHECK(value == subclass);
+  value = CompileRun("Reflect.construct(f, [], Array)");
+  CHECK(value->IsFunction());
+  CHECK(value ==
+        context->Global()
+            ->Get(context.local(), v8_str("Array"))
+            .ToLocalChecked());
+}
 
 THREADED_TEST(ObjectProtoToString) {
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
   Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(isolate);
   templ->SetClassName(v8_str("MyClass"));
 
   LocalContext context;
 
   Local<String> customized_tostring = v8_str("customized toString");
@@ skipping 11733 matching lines @@
 }
 
 TEST(PrivateForApiIsNumber) {
   LocalContext context;
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
 
   // Shouldn't crash.
   v8::Private::ForApi(isolate, v8_str("42"));
 }