JSTests/test262/test/built-ins/Array/prototype/copyWithin/negative-end.js

// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.copywithin
description: >
  Set values with negative end argument.
info: |
  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )

  ...
  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
  ToInteger(end).
  12. ReturnIfAbrupt(relativeEnd).
  13. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
  final be min(relativeEnd, len).
  ...
includes: [compareArray.js]
---*/

assert(
  compareArray(
    [0, 1, 2, 3].copyWithin(0, 1, -1), [1, 2, 2, 3]
  ),
  '[0, 1, 2, 3].copyWithin(0, 1, -1) -> [1, 2, 2, 3]'
);

assert(
  compareArray(
    [0, 1, 2, 3, 4].copyWithin(2, 0, -1), [0, 1, 0, 1, 2]
  ),
  '[0, 1, 2, 3, 4].copyWithin(2, 0, -1) -> [0, 1, 0, 1, 2]'
);

assert(
  compareArray(
    [0, 1, 2, 3, 4].copyWithin(1, 2, -2), [0, 2, 2, 3, 4]
  ),
  '[0, 1, 2, 3, 4].copyWithin(1, 2, -2) -> [0, 2, 2, 3, 4]'
);

assert(
  compareArray(
    [0, 1, 2, 3].copyWithin(0, -2, -1), [2, 1, 2, 3]
  ),
  '[0, 1, 2, 3].copyWithin(0, -2, -1) -> [2, 1, 2, 3]'
);

assert(
  compareArray(
    [0, 1, 2, 3, 4].copyWithin(2, -2, -1), [0, 1, 3, 3, 4]
  ),
  '[0, 1, 2, 3, 4].copyWithin(2, -2, 1) -> [0, 1, 3, 3, 4]'
);

assert(
  compareArray(
    [0, 1, 2, 3].copyWithin(-3, -2, -1), [0, 2, 2, 3]
  ),
  '[0, 1, 2, 3].copyWithin(-3, -2, -1) -> [0, 2, 2, 3]'
);

assert(
  compareArray(
    [0, 1, 2, 3, 4].copyWithin(-2, -3, -1), [0, 1, 2, 2, 3]
  ),
  '[0, 1, 2, 3, 4].copyWithin(-2, -3, -1) -> [0, 1, 2, 2, 3]'
);

assert(
  compareArray(
    [0, 1, 2, 3, 4].copyWithin(-5, -2, -1), [3, 1, 2, 3, 4]
  ),
  '[0, 1, 2, 3, 4].copyWithin(-5, -2, -1) -> [3, 1, 2, 3, 4]'
);