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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js new file mode 100644 index 0000000000..eac5ed5374 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js @@ -0,0 +1,49 @@ +// Copyright (C) 2021 Microsoft. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-array.prototype.findlastindex +description: > + The range of elements processed is set before the first call to `predicate`. +info: | + Array.prototype.findLastIndex ( predicate[ , thisArg ] ) + + ... + 4. Let k be len - 1. + 5. Repeat, while k ≥ 0, + ... + c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)). + ... +features: [array-find-from-last] +---*/ + +var arr = ['Shoes', 'Car', 'Bike']; +var results = []; + +arr.findLastIndex(function(kValue) { + if (results.length === 0) { + arr.splice(1, 1); + } + results.push(kValue); +}); + +assert.sameValue(results.length, 3, 'predicate called three times'); +assert.sameValue(results[0], 'Bike'); +assert.sameValue(results[1], 'Bike'); +assert.sameValue(results[2], 'Shoes'); + +results = []; +arr = ['Skateboard', 'Barefoot']; +arr.findLastIndex(function(kValue) { + if (results.length === 0) { + arr.push('Motorcycle'); + arr[0] = 'Magic Carpet'; + } + + results.push(kValue); +}); + +assert.sameValue(results.length, 2, 'predicate called twice'); +assert.sameValue(results[0], 'Barefoot'); +assert.sameValue(results[1], 'Magic Carpet'); + +reportCompare(0, 0); |