diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js new file mode 100644 index 0000000000..9e884f98c1 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js @@ -0,0 +1,31 @@ +// Copyright (C) 2021 Igalia, S.L. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-array.prototype.toReversed +description: > + Array.prototype.toReversed does not preserve holes in the array +info: | + Array.prototype.toReversed ( ) + + ... + 2. Let len be ? LengthOfArrayLike(O). + ... + 5. Repeat, while k < len + a. Let from be ! ToString(𝔽(len - k - 1)). + ... + c. Let fromValue be ? Get(O, from). + d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue). + ... +features: [change-array-by-copy] +includes: [compareArray.js] +---*/ + +var arr = [0, /* hole */, 2, /* hole */, 4]; +Array.prototype[3] = 3; + +var reversed = arr.toReversed(); +assert.compareArray(reversed, [4, 3, 2, undefined, 0]); +assert(reversed.hasOwnProperty(3)); + +reportCompare(0, 0); |