diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js new file mode 100644 index 0000000000..27489250fd --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js @@ -0,0 +1,38 @@ +// Copyright (C) 2023 Richard Gibson. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-array.prototype.findlastindex +description: > + Support the maximum valid integer index. +info: | + Array.prototype.findLastIndex ( predicate [ , thisArg ] ) + + 1. Let O be ? ToObject(this value). + 2. Let len be ? LengthOfArrayLike(O). + + LengthOfArrayLike ( obj ) + + 1. Return ℝ(? ToLength(? Get(obj, "length"))). + + ToLength ( argument ) + + 1. Let len be ? ToIntegerOrInfinity(argument). + 2. If len ≤ 0, return +0𝔽. + 3. Return 𝔽(min(len, 2**53 - 1)). +features: [array-find-from-last] +---*/ + +var tooBigLength = Number.MAX_VALUE; +var maxExpectedIndex = 9007199254740990; +var arrayLike = { length: tooBigLength }; +var calledWithIndex = []; + +Array.prototype.findLastIndex.call(arrayLike, function(_value, index) { + calledWithIndex.push(index); + return true; +}); + +assert.sameValue(calledWithIndex.length, 1, 'predicate invoked once'); +assert.sameValue(calledWithIndex[0], maxExpectedIndex); + +reportCompare(0, 0); |