diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js new file mode 100644 index 0000000000..cc025bd98e --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js @@ -0,0 +1,24 @@ +// 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.toSpliced +description: > + Array.prototype.toSpliced treats negative Infinity as zero for start. +info: | + Array.prototype.toSpliced ( start, deleteCount, ...items ) + + ... + 2. Let len be ? LengthOfArrayLike(O). + 3. Let relativeStart be ? ToIntegerOrInfinity(start). + 4. If relativeStart is -∞, let actualStart be 0. + 5. Else if relativeStart < 0, let actualStart be max(len + relativeStart, 0). + ... +features: [change-array-by-copy] +includes: [compareArray.js] +---*/ + +var result = [0, 1, 2, 3, 4].toSpliced(-Infinity, 2); +assert.compareArray(result, [2, 3, 4]); + +reportCompare(0, 0); |