v8/test/mjsunit/string-concat.js
caitpotter88 24a9b8815e [es5] call ToString() on argument in String.prototype.concat() fast case
15.5.4.6 5.b requires each part to be converted using ToString(). This also needs to occur in the single argument fast-case.

BUG=v8:3981
R=arv@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1029103002

Cr-Commit-Position: refs/heads/master@{#27372}
2015-03-23 15:07:46 +00:00

15 lines
478 B
JavaScript

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
function Stringified(toString) {
var valueOf = "-" + toString + "-";
return {
toString: function() { return toString; },
valueOf: function() { return valueOf; }
};
}
assertEquals("a.b.", "a.".concat(Stringified("b.")));
assertEquals("a.b.c.", "a.".concat(Stringified("b."), Stringified("c.")));