JSTests/test262/test/built-ins/Proxy/has/return-true-without-same-target-prop.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: 9.5.7
description: >
    The result of [[HasProperty]] is a Boolean value and will affect has
    checkings. True returned when target property doesn't exists;
features: [Proxy]
---*/

var p = new Proxy({}, {
  has: function(t, prop) {
    return true;
  }
});

assert.sameValue(("attr" in p), true);