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Expect TypeError when sealing non-empty TypedArrays

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André Bargull 2024-12-16 19:36:06 +01:00 committed by Jordan Harband
parent a977d3b649
commit e99213a96e
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1 changed files with 70 additions and 1 deletions
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71
test/staging/built-ins/Object/seal/seal-variable-length-typed-arrays.js
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@ -15,6 +15,39 @@ for (let ctor of ctors) {
const lengthTracking = new ctor(rab); const lengthTracking = new ctor(rab);
const lengthTrackingWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT); const lengthTrackingWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT);
assert.notSameValue(fixedLength.length, 0);
assert.notSameValue(fixedLengthWithOffset.length, 0);
assert.notSameValue(lengthTracking.length, 0);
assert.notSameValue(lengthTrackingWithOffset.length, 0);
// "Fixed length" TAs backed by RABs can shrink then re-grow.
assert.throws(TypeError, function() {
Object.seal(fixedLength);
});
assert.throws(TypeError, function() {
Object.seal(fixedLengthWithOffset);
});
assert.throws(TypeError, function() {
Object.seal(lengthTracking);
});
assert.throws(TypeError, function() {
Object.seal(lengthTrackingWithOffset);
});
}
for (let ctor of ctors) {
const rab = new ArrayBuffer(4 * ctor.BYTES_PER_ELEMENT, { maxByteLength: 8 * ctor.BYTES_PER_ELEMENT });
const rabZeroLength = new ArrayBuffer(0, { maxByteLength: 8 * ctor.BYTES_PER_ELEMENT });
const fixedLength = new ctor(rab, 0, 0);
const fixedLengthWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT, 0);
const lengthTracking = new ctor(rabZeroLength);
const lengthTrackingWithOffset = new ctor(rab, 4 * ctor.BYTES_PER_ELEMENT);
assert.sameValue(fixedLength.length, 0);
assert.sameValue(fixedLengthWithOffset.length, 0);
assert.sameValue(lengthTracking.length, 0);
assert.sameValue(lengthTrackingWithOffset.length, 0);
// "Fixed length" TAs backed by RABs can shrink then re-grow. // "Fixed length" TAs backed by RABs can shrink then re-grow.
assert.throws(TypeError, function() { assert.throws(TypeError, function() {
Object.seal(fixedLength); Object.seal(fixedLength);
@ -37,7 +70,43 @@ for (let ctor of ctors) {
const lengthTracking = new ctor(gsab); const lengthTracking = new ctor(gsab);
const lengthTrackingWithOffset = new ctor(gsab, 2 * ctor.BYTES_PER_ELEMENT); const lengthTrackingWithOffset = new ctor(gsab, 2 * ctor.BYTES_PER_ELEMENT);
// Fixed length TAs backed by GSABs can't shrink, and so are allowed. assert.notSameValue(fixedLength.length, 0);
assert.notSameValue(fixedLengthWithOffset.length, 0);
assert.notSameValue(lengthTracking.length, 0);
assert.notSameValue(lengthTrackingWithOffset.length, 0);
// Fixed length TAs backed by GSABs can't shrink, and so are allowed. TypedArray
// properties can't be redefined to non-configurable, so this still throws.
assert.throws(TypeError, function() {
Object.seal(fixedLength);
});
assert.throws(TypeError, function() {
Object.seal(fixedLengthWithOffset);
});
assert.throws(TypeError, function() {
Object.seal(lengthTracking);
});
assert.throws(TypeError, function() {
Object.seal(lengthTrackingWithOffset);
});
}
for (let ctor of ctors) {
const gsab = new SharedArrayBuffer(4 * ctor.BYTES_PER_ELEMENT, { maxByteLength: 8 * ctor.BYTES_PER_ELEMENT });
const gsabZeroLength = new SharedArrayBuffer(0, { maxByteLength: 8 * ctor.BYTES_PER_ELEMENT });
const fixedLength = new ctor(gsab, 0, 0);
const fixedLengthWithOffset = new ctor(gsab, 2 * ctor.BYTES_PER_ELEMENT, 0);
const lengthTracking = new ctor(gsabZeroLength);
const lengthTrackingWithOffset = new ctor(gsab, 4 * ctor.BYTES_PER_ELEMENT);
assert.sameValue(fixedLength.length, 0);
assert.sameValue(fixedLengthWithOffset.length, 0);
assert.sameValue(lengthTracking.length, 0);
assert.sameValue(lengthTrackingWithOffset.length, 0);
// Fixed zero-length TAs backed by GSABs can't shrink, and so are allowed. If
// the TypedArray is zero length, there's no attempt to redefine TypedArray
// properties.
Object.seal(fixedLength); Object.seal(fixedLength);
Object.seal(fixedLengthWithOffset); Object.seal(fixedLengthWithOffset);
assert.throws(TypeError, function() { assert.throws(TypeError, function() {