diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js new file mode 100644 index 0000000000..8102da0e52 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js @@ -0,0 +1,42 @@ +// 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.with +description: > + Array.prototype.with caches the length getting the array elements. +info: | + Array.prototype.with ( index, value ) + + ... + 2. Let len be ? LengthOfArrayLike(O). + ... + 5. Repeat, while k < len + a. Let Pk be ! ToString(𝔽(k)). + b. If k is actualIndex, let fromValue be value. + c. Else, let fromValue be ? Get(O, Pk). + d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue). + e. Set k to k + 1. +features: [change-array-by-copy] +includes: [compareArray.js] +---*/ + +Array.prototype[4] = 5; + +var arr = Object.defineProperty([0, 1, 2, 3, 4], "1", { + get() { + arr.length = 1; + return 1; + } +}); +assert.compareArray(arr.with(2, 7), [0, 1, 7, undefined, 5]); + +arr = Object.defineProperty([0, 1, 2, 3, 4], "1", { + get() { + arr.length = 1; + return 1; + } +}); +assert.compareArray(arr.with(0, 7), [7, 1, undefined, undefined, 5]); + +reportCompare(0, 0); |