| // Copyright (C) 2017 Mozilla Corporation. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-integer-indexed-exotic-objects-defineownproperty-p-desc |
| description: > |
| Defining a typed array element to a value that, when converted to the typed |
| array element type, detaches the typed array's underlying buffer, should |
| throw a TypeError and not modify the typed array. |
| info: | |
| 9.4.5.3 [[DefineOwnProperty]] ( P, Desc ) |
| |
| ... |
| 3. If Type(P) is String, then |
| a. Let numericIndex be ! CanonicalNumericIndexString(P). |
| b. If numericIndex is not undefined, then |
| ... |
| x. If Desc has a [[Value]] field, then |
| 1. Let value be Desc.[[Value]]. |
| 2. Return ? IntegerIndexedElementSet(O, numericIndex, value). |
| ... |
| |
| 9.4.5.9 IntegerIndexedElementSet ( O, index, value ) |
| |
| ... |
| 15. Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue). |
| 16. Return true. |
| includes: [testBigIntTypedArray.js, detachArrayBuffer.js] |
| features: [BigInt, Reflect, TypedArray] |
| ---*/ |
| |
| testWithBigIntTypedArrayConstructors(function(TA) { |
| var ta = new TA([17n]); |
| |
| var desc = |
| { |
| value: { |
| valueOf: function() { |
| $DETACHBUFFER(ta.buffer); |
| return 42n; |
| } |
| } |
| }; |
| |
| assert.throws(TypeError, function() { |
| Reflect.defineProperty(ta, 0, desc); |
| }, |
| "detaching a ArrayBuffer during defining an element of a typed array " + |
| "viewing it should throw"); |
| |
| assert.throws(TypeError, function() { |
| ta[0]; |
| }); |
| }); |
| |