call-parameters-new-target.js

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// Copyright (C) 2017 Aleksey Shvayka. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

esid: sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget

description: >

    trap is called with handler object as its context, and parameters are:

    target, an array list with the called arguments and the NewTarget

info: |

    [[Construct]] (argumentsList, newTarget)

    9. Let newObj be Call(trap, handler, «target, argArray, newTarget»).

features: [Proxy, Reflect, Reflect.construct]

---*/

function Target() {}

function NewTarget() {}

var handler = {

  construct: function(target, args, newTarget) {

    assert.sameValue(this, handler, "trap context is the handler object");

    assert.sameValue(target, Target, "first parameter is the target object");

    assert.sameValue(args.length, 2, "arguments list contains all construct arguments");

    var a = args[0];

    var b = args[1];

    assert.sameValue(a, 1, "arguments list has first construct argument");

    assert.sameValue(b, 2, "arguments list has second construct argument");

    assert.sameValue(newTarget, NewTarget, "newTarget is passed as the third parameter");

    return {

      sum: a + b

};

},

};

var P = new Proxy(Target, handler);

var res = Reflect.construct(P, [1, 2], NewTarget);

assert.sameValue(res.sum, 3);

reportCompare(0, 0);