test/mjsunit/es6/regress/regress-cr493566.js

// Copyright 2015 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.

// Flags: --harmony-proxies --harmony-reflect

"use strict";
var global = this;

(function TestGlobalReceiver() {
  class A {
    s(value) {
      super.bla = value;
    }
  }
  var a = new A();
  a.s(9);
  assertEquals(undefined, global.bla);
  assertEquals(9, a.bla);

  a = new A();
  a.s.call(global, 10);
  assertEquals(10, global.bla);
  assertEquals(undefined, a.bla);
})();


(function TestProxyProto() {
  var calls = 0;
  var handler = {
    set(t, p, v, r) {
      calls++;
      return Reflect.set(t, p, v, r);
    },
    getPropertyDescriptor(target, name) {
      calls += 10;
      return undefined;
    }
  };
  var target = {};
  var proxy = new Proxy(target, handler);
  var object = {
    __proto__: proxy,
    setX(v) {
      super.x = v;
    },
    setSymbol(sym, v) {
      super[sym] = v;
    }
  };

  object.setX(1);
  assertEquals(1, object.x);
  assertEquals(1, Object.getOwnPropertyDescriptor(object, 'x').value);
  assertEquals(1, calls);

  calls = 0;
  object.setX.call(proxy, 2);
  assertEquals(2, target.x);
  assertEquals(1, Object.getOwnPropertyDescriptor(object, 'x').value);
  assertEquals(1, calls);

  var sym = Symbol();
  calls = 0;
  object.setSymbol.call(global, sym, 2);
  assertEquals(2, Object.getOwnPropertyDescriptor(global, sym).value);
  // We currently do not invoke proxy traps for symbols
  assertEquals(1, calls);
});


(function TestProxyReceiver() {
  var object = {
    setY(v) {
      super.y = v;
    }
  };

  var calls = 0;
  var target = {target:1};
  var handler = {
    getOwnPropertyDescriptor(t, name) {
      calls++;
    },
    defineProperty(t, name, desc) {
      calls += 10;
      t[name] = desc.value;
      return true;
    },
    set(target, name, value) {
      assertUnreachable();
    }
  };
  var proxy = new Proxy(target, handler);

  assertEquals(undefined, object.y);
  object.setY(10);
  assertEquals(10, object.y);

  // Change the receiver to the proxy, but the set is called on the global.
  object.setY.call(proxy, 3);
  assertEquals(3, target.y);
  assertEquals(11, calls);
})();