JSTests/test262/test/language/expressions/arrow-function/lexical-new.target.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: 14.2.16
description: >
    Runtime Semantics: Evaluation

    new.target

    ...
    4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
    ...

    The non-normative note elaborates on the "scope" argument:

    An ArrowFunction does not define local bindings for arguments, super, this, or new.target. Any reference to arguments, super, or this within an ArrowFunction must resolve to a binding in a lexically enclosing environment. Typically this will be the Function Environment of an immediately enclosing function. Even though an ArrowFunction may contain references to super, the function object created in step 4 is not made into a method by performing MakeMethod. An ArrowFunction that references super is always contained within a non-ArrowFunction and the necessary state to implement super is accessible via the scope that is captured by the function object of the ArrowFunction.
features: [arrow-function, new.target]
---*/

var functionInvocationCount = 0;
var newInvocationCount = 0;

function F() {
  if ((_ => new.target)() !== undefined) {
    newInvocationCount++;
  }
  functionInvocationCount++;
}

F();
new F();

assert.sameValue(functionInvocationCount, 2);
assert.sameValue(newInvocationCount, 1);