JSTests/test262/test/language/expressions/postfix-increment/target-cover-id.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-postfix-expressions-static-semantics-early-errors
es6id: 12.4.1
es5id: 11.1.6_A3_T5
description: Applied to a "covered" IdentifierReference
info: |
  PostfixExpression :
    LeftHandSideExpression ++
    LeftHandSideExpression --

  - It is an early Reference Error if IsValidSimpleAssignmentTarget of
    LeftHandSideExpression is false.

  Static Semantics: IsValidSimpleAssignmentTarget

  IdentifierReference : Identifier

  1. If this IdentifierReference is contained in strict mode code and
     StringValue of Identifier is "eval" or "arguments", return false.
  2. Return true.
---*/

var y = 1;

(y)++;

assert.sameValue(y, 2);