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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js new file mode 100644 index 0000000000..4294babb48 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js @@ -0,0 +1,52 @@ +// Copyright (C) 2020 Alexey Shvayka. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-array.prototype.flat +description: > + Non-writable properties are overwritten by CreateDataProperty. + (result object's "0" is non-writable, source array gets flattened) +info: | + Array.prototype.flat ( [ depth ] ) + + [...] + 6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum). + + FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] ) + + [...] + 9. Repeat, while sourceIndex < sourceLen + [...] + c. If exists is true, then + [...] + v. If shouldFlatten is true, then + [...] + 2. Set targetIndex to ? FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1). + [...] +features: [Symbol.species] +includes: [propertyHelper.js] +---*/ + +var A = function(_length) { + Object.defineProperty(this, "0", { + value: 1, + writable: false, + enumerable: false, + configurable: true, + }); +}; + +var arr = [[2]]; +arr.constructor = {}; +arr.constructor[Symbol.species] = A; + +var res = arr.flat(1); + +verifyProperty(res, "0", { + value: 2, + writable: true, + enumerable: true, + configurable: true, +}); + +reportCompare(0, 0); |