test262/test/built-ins/Proxy/get/trap-is-undefined.js

// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 9.5.8
description: >
    [[Get]] (P, Receiver)

    8. If trap is undefined, then return target.[[Get]](P, Receiver).

features: [Proxy]
---*/

var target = {
  attr: 1
};
var p = new Proxy(target, {
  get: undefined
});

assert.sameValue(p.attr, 1, 'return target.attr');
assert.sameValue(p.foo, undefined, 'return target.foo');