[proxies] Expose proxies in the 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
@@ skipping 24269 matching lines @@
     CHECK_NE(*object->Get(env2.local(), v8_str("values")).ToLocalChecked(),
              *object2->Get(env2.local(), v8_str("values")).ToLocalChecked());
 
     auto values2 = Local<Function>::Cast(
         object2->Get(env2.local(), v8_str("values")).ToLocalChecked());
     auto fn2 = i::Handle<i::JSFunction>::cast(v8::Utils::OpenHandle(*values2));
     auto ctx2 = v8::Utils::OpenHandle(*env2.local());
     CHECK_EQ(fn2->GetCreationContext(), *ctx2);
   }
 }
+
+
+TEST(Proxy) {
+  i::FLAG_harmony_proxies = true;
+  LocalContext context;
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+  v8::Local<v8::Object> target = CompileRun("({})").As<v8::Object>();
+  v8::Local<v8::Object> handler = CompileRun("({})").As<v8::Object>();
+
+  v8::Local<v8::Proxy> proxy =
+      v8::Proxy::New(context.local(), target, handler).ToLocalChecked();
+  CHECK(proxy->IsProxy());
+  CHECK(!target->IsProxy());
+  CHECK(!proxy->IsRevoked());
+  CHECK(proxy->GetTarget()->SameValue(target));
+  CHECK(proxy->GetHandler()->SameValue(handler));
+
+  proxy->Revoke();
+  CHECK(proxy->IsProxy());
+  CHECK(!target->IsProxy());
+  CHECK(proxy->IsRevoked());
+  CHECK(proxy->GetTarget()->SameValue(target));
+  CHECK(proxy->GetHandler()->IsNull());
+}