js/src/jsapi-tests/testSetPropertyIgnoringNamedGetter.cpp
author Jon Coppeard <jcoppeard@mozilla.com>
Mon, 14 Jan 2019 11:02:35 +0000
changeset 453704 1cebf4f5c850ad22500a360c2742de3c9dd78c81
parent 448963 66eb1f485c1a3ea81372758bc92292c9428b17cd
child 455667 46790408df7f559425becab13650b0d2c89d108b
permissions -rw-r--r--
Bug 1519397 - Factor GC locking RAII classes out of vm/Runtime.h r=pbone

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 */

#include "jsfriendapi.h"

#include "js/Proxy.h"

#include "jsapi-tests/tests.h"

using namespace js;
using namespace JS;

class CustomProxyHandler : public Wrapper {
 public:
  CustomProxyHandler() : Wrapper(0) {}

  bool getPropertyDescriptor(
      JSContext* cx, HandleObject proxy, HandleId id,
      MutableHandle<PropertyDescriptor> desc) const override {
    return impl(cx, proxy, id, desc, false);
  }

  bool getOwnPropertyDescriptor(
      JSContext* cx, HandleObject proxy, HandleId id,
      MutableHandle<PropertyDescriptor> desc) const override {
    return impl(cx, proxy, id, desc, true);
  }

  bool set(JSContext* cx, HandleObject proxy, HandleId id, HandleValue v,
           HandleValue receiver, ObjectOpResult& result) const override {
    Rooted<PropertyDescriptor> desc(cx);
    if (!Wrapper::getPropertyDescriptor(cx, proxy, id, &desc)) {
      return false;
    }
    return SetPropertyIgnoringNamedGetter(cx, proxy, id, v, receiver, desc,
                                          result);
  }

 private:
  bool impl(JSContext* cx, HandleObject proxy, HandleId id,
            MutableHandle<PropertyDescriptor> desc, bool ownOnly) const {
    if (JSID_IS_STRING(id)) {
      bool match;
      if (!JS_StringEqualsAscii(cx, JSID_TO_STRING(id), "phantom", &match)) {
        return false;
      }
      if (match) {
        desc.object().set(proxy);
        desc.attributesRef() = JSPROP_ENUMERATE;
        desc.value().setInt32(42);
        return true;
      }
    }

    if (ownOnly) {
      return Wrapper::getOwnPropertyDescriptor(cx, proxy, id, desc);
    }
    return Wrapper::getPropertyDescriptor(cx, proxy, id, desc);
  }
};

const CustomProxyHandler customProxyHandler;

BEGIN_TEST(testSetPropertyIgnoringNamedGetter_direct) {
  RootedValue protov(cx);
  EVAL("Object.prototype", &protov);

  RootedValue targetv(cx);
  EVAL("({})", &targetv);

  RootedObject proxyObj(cx, NewProxyObject(cx, &customProxyHandler, targetv,
                                           &protov.toObject(), ProxyOptions()));
  CHECK(proxyObj);

  CHECK(JS_DefineProperty(cx, global, "target", targetv, 0));
  CHECK(JS_DefineProperty(cx, global, "proxy", proxyObj, 0));

  RootedValue v(cx);
  EVAL("Object.getOwnPropertyDescriptor(proxy, 'phantom').value", &v);
  CHECK_SAME(v, Int32Value(42));

  EXEC("proxy.phantom = 123");
  EVAL("Object.getOwnPropertyDescriptor(proxy, 'phantom').value", &v);
  CHECK_SAME(v, Int32Value(42));
  EVAL("target.phantom", &v);
  CHECK_SAME(v, Int32Value(123));

  return true;
}
END_TEST(testSetPropertyIgnoringNamedGetter_direct)