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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js new file mode 100644 index 0000000000..112824f6e6 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js @@ -0,0 +1,51 @@ +// |reftest| async +// Copyright (C) 2023 Igalia, S.L. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-array.fromasync +description: > + Overwrites non-writable element properties on an instance of a custom + this-value +info: | + 3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_). + ... + 3.k.vii.6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_). +includes: [asyncHelpers.js] +flags: [async] +features: [Array.fromAsync] +---*/ + +asyncTest(async function () { + function MyArray() { + this.length = 4; + for (let ix = 0; ix < this.length; ix++) { + Object.defineProperty(this, ix, { + enumerable: true, + writable: false, + configurable: true, + value: 99 + }); + } + } + + let result = await Array.fromAsync.call(MyArray, [0, 1, 2]); + assert.sameValue(result.length, 3, "Length property is overwritten"); + assert.sameValue(result[0], 0, "Read-only element 0 is overwritten"); + assert.sameValue(result[1], 1, "Read-only element 1 is overwritten"); + assert.sameValue(result[2], 2, "Read-only element 2 is overwritten"); + assert.sameValue(result[3], 99, "Element 3 is not overwritten"); + + result = await Array.fromAsync.call(MyArray, { + length: 3, + 0: 0, + 1: 1, + 2: 2, + 3: 3 // ignored + }); + assert.sameValue(result.length, 3, "Length property is overwritten"); + assert.sameValue(result[0], 0, "Read-only element 0 is overwritten"); + assert.sameValue(result[1], 1, "Read-only element 1 is overwritten"); + assert.sameValue(result[2], 2, "Read-only element 2 is overwritten"); + assert.sameValue(result[3], 99, "Element 3 is not overwritten"); +}); |