diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js new file mode 100644 index 0000000000..b9268c91b3 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js @@ -0,0 +1,49 @@ +// 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.concat +description: > + Non-writable properties are overwritten by CreateDataProperty. + (result object's "0" is non-writable, argument is not spreadable) +info: | + Array.prototype.concat ( ...arguments ) + + [...] + 5. Repeat, while items is not empty + [...] + c. If spreadable is true, then + [...] + iv. Repeat, while k < len + [...] + 3. If exists is true, then + [...] + b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement). + [...] +features: [Symbol.species] +includes: [propertyHelper.js] +---*/ + +var A = function(_length) { + Object.defineProperty(this, "0", { + value: 1, + writable: false, + enumerable: false, + configurable: true, + }); +}; + +var arr = []; +arr.constructor = {}; +arr.constructor[Symbol.species] = A; + +var res = arr.concat(2); + +verifyProperty(res, "0", { + value: 2, + writable: true, + enumerable: true, + configurable: true, +}); + +reportCompare(0, 0); |