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Diffstat (limited to 'js/src/tests/test262/built-ins/ArrayBuffer/prototype/resize/resize-grow.js')
-rw-r--r-- | js/src/tests/test262/built-ins/ArrayBuffer/prototype/resize/resize-grow.js | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/ArrayBuffer/prototype/resize/resize-grow.js b/js/src/tests/test262/built-ins/ArrayBuffer/prototype/resize/resize-grow.js new file mode 100644 index 0000000000..adb95fe528 --- /dev/null +++ b/js/src/tests/test262/built-ins/ArrayBuffer/prototype/resize/resize-grow.js @@ -0,0 +1,80 @@ +// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options +// 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-arraybuffer.prototype.resize +description: Behavior when attempting to grow a resizable array buffer +info: | + ArrayBuffer.prototype.resize ( newLength ) + + 1. Let O be the this value. + 2. Perform ? RequireInternalSlot(O, [[ArrayBufferMaxByteLength]]). + 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception. + 4. If IsDetachedBuffer(O) is true, throw a TypeError exception. + 5. Let newByteLength be ? ToIntegerOrInfinity(newLength). + 6. If newByteLength < 0 or newByteLength > O.[[ArrayBufferMaxByteLength]], + throw a RangeError exception. + 7. Let hostHandled be ? HostResizeArrayBuffer(O, newByteLength). + [...] + + HostResizeArrayBuffer ( buffer, newByteLength ) + + The implementation of HostResizeArrayBuffer must conform to the following + requirements: + + - The abstract operation does not detach buffer. + - The abstract operation may complete normally or abruptly. + - If the abstract operation completes normally with handled, + buffer.[[ArrayBufferByteLength]] is newByteLength. + - The return value is either handled or unhandled. +features: [resizable-arraybuffer] +---*/ + +var ab = new ArrayBuffer(4, {maxByteLength: 5}); +var caught = false; +var result; + +// 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 ab.resize, 'function'); + +try { + result = ab.resize(5); +} catch (_) { + caught = true; +} + +try { + ab.slice(); +} catch (_) { + throw new Test262Error('The ArrayBuffer under test was detached'); +} + +// One of the following three conditions must be met: +// +// - HostResizeArrayBuffer returns an abrupt completion +// - HostResizeArrayBuffer handles the resize operation and conforms to the +// invarient regarding [[ArrayBufferByteLength]] +// - HostResizeArrayBuffer does not handle the resize operation, and the +// `resize` method updates [[ArrayBufferByteLength]] +// +// The final two conditions are indistinguishable. +assert(caught || ab.byteLength === 5, 'byteLength'); + +// One of the following three conditions must be met: +// +// - HostResizeArrayBuffer returns an abrupt completion +// - HostResizeArrayBuffer handles the resize operation, and the `resize` +// method returns early +// - HostResizeArrayBuffer does not handle the resize operation, and the +// `resize` method executes its final steps +// +// All three conditions have the same effect on the value of `result`. +assert.sameValue(result, undefined, 'normal completion value'); + +// The contents of the ArrayBuffer are not guaranteed by the host-defined +// abstract operation, so they are not asserted in this test. + +reportCompare(0, 0); |