diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/DataView/custom-proto-access-resizes-buffer-valid-by-length.js')
-rw-r--r-- | js/src/tests/test262/built-ins/DataView/custom-proto-access-resizes-buffer-valid-by-length.js | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/DataView/custom-proto-access-resizes-buffer-valid-by-length.js b/js/src/tests/test262/built-ins/DataView/custom-proto-access-resizes-buffer-valid-by-length.js new file mode 100644 index 0000000000..3aacc841b4 --- /dev/null +++ b/js/src/tests/test262/built-ins/DataView/custom-proto-access-resizes-buffer-valid-by-length.js @@ -0,0 +1,35 @@ +// |reftest| skip -- resizable-arraybuffer is not supported +// Copyright (C) 2021 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-dataview-buffer-byteoffset-bytelength +description: > + The sum of the view's offset and byte length may equal the underlying + buffer's byte length if it is modified during retrieval of the NewTarget's + prototype. +features: [resizable-arraybuffer] +---*/ + +// If the host chooses to throw as allowed by the specification, the observed +// behavior will be identical to the case where `ArrayBuffer.prototype.resize` +// has not been implemented. The following assertion prevents this test from +// passing in runtimes which have not implemented the method. +assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function'); + +var buffer = new ArrayBuffer(3, {maxByteLength: 3}); + +var newTarget = function() {}.bind(null); +Object.defineProperty(newTarget, 'prototype', { + get: function() { + try { + buffer.resize(2); + } catch (error) {} + } +}); + +var result = Reflect.construct(DataView, [buffer, 1, 1], newTarget); + +assert.sameValue(result.constructor, DataView); +assert.sameValue(result.byteLength, 1); + +reportCompare(0, 0); |