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Diffstat (limited to 'js/src/tests/test262/built-ins/TypedArray/prototype/length/BigInt/resizable-array-buffer-fixed.js')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArray/prototype/length/BigInt/resizable-array-buffer-fixed.js | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/length/BigInt/resizable-array-buffer-fixed.js b/js/src/tests/test262/built-ins/TypedArray/prototype/length/BigInt/resizable-array-buffer-fixed.js new file mode 100644 index 0000000000..793f12d5d4 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArray/prototype/length/BigInt/resizable-array-buffer-fixed.js @@ -0,0 +1,49 @@ +// |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-get-%typedarray%.prototype.length +description: | + reset to 0 if the underlying ArrayBuffer is resized beyond the boundary of + the fixed-sized TypedArray instance +includes: [testBigIntTypedArray.js] +features: [ArrayBuffer, BigInt, TypedArray, 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"); + +testWithBigIntTypedArrayConstructors(function(TA) { + var BPE = TA.BYTES_PER_ELEMENT; + var ab = new ArrayBuffer(BPE * 4, {maxByteLength: BPE * 5}); + var array = new TA(ab, BPE, 2); + + assert.sameValue(array.length, 2, "initial value"); + + try { + ab.resize(BPE * 5); + } catch (_) {} + + assert.sameValue(array.length, 2, "following grow"); + + try { + ab.resize(BPE * 3); + } catch (_) {} + + assert.sameValue(array.length, 2, "following shrink (within bounds)"); + + var expected; + try { + ab.resize(BPE * 2); + expected = 0; + } catch (_) { + expected = 2; + } + + assert.sameValue(array.length, expected, "following shrink (out of bounds)"); +}); + +reportCompare(0, 0); |