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

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.copywithin
description: >
  Set values with negative end argument.
info: |
  22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [ , end ] )

  %TypedArray%.prototype.copyWithin is a distinct function that implements the
  same algorithm as Array.prototype.copyWithin as defined in 22.1.3.3 except
  that the this object's [[ArrayLength]] internal slot is accessed in place of
  performing a [[Get]] of "length" and the actual copying of values in step 12
  must be performed in a manner that preserves the bit-level encoding of the
  source data.

  ...

  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )

  ...
  7. If end is undefined, let relativeEnd be len; else let relativeEnd be ?
  ToInteger(end).
  8. If relativeEnd < 0, let final be max((len + relativeEnd), 0); else let
  final be min(relativeEnd, len).
  ...
includes: [compareArray.js, testBigIntTypedArray.js]
features: [BigInt, TypedArray]
---*/

testWithBigIntTypedArrayConstructors(function(TA) {
  assert(
    compareArray(
      new TA([0n, 1n, 2n, 3n]).copyWithin(0, 1, -1),
      [1n, 2n, 2n, 3n]
    ),
    '[0, 1, 2, 3].copyWithin(0, 1, -1) -> [1, 2, 2, 3]'
  );

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

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

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

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

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

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

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