js/src/tests/test262/built-ins/String/prototype/codePointAt/returns-undefined-on-position-less-than-zero.js


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// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 21.1.3.3
description: >
  If pos < size, return undefined
info: |
  21.1.3.3 String.prototype.codePointAt ( pos )

  1. Let O be RequireObjectCoercible(this value).
  2. Let S be ToString(O).
  3. ReturnIfAbrupt(S).
  4. Let position be ToInteger(pos).
  5. ReturnIfAbrupt(position).
  6. Let size be the number of elements in S.
  7. If position < 0 or position ≥ size, return undefined.
---*/

assert.sameValue('abc'.codePointAt(-1), undefined);
assert.sameValue('abc'.codePointAt(-Infinity), undefined);

reportCompare(0, 0);