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const EMPTY = 0;
const INLINE_STORAGE = 10;
const NON_INLINE_STORAGE = 1024;
// Empty typed arrays can be sealed.
{
let ta = new Int32Array(EMPTY);
Object.seal(ta);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), true);
assertEq(Object.isFrozen(ta), true);
}
// Non-empty typed arrays cannot be sealed.
for (let length of [INLINE_STORAGE, NON_INLINE_STORAGE]) {
let ta = new Int32Array(length);
assertThrowsInstanceOf(() => Object.seal(ta), TypeError);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), false);
assertEq(Object.isFrozen(ta), false);
}
// Empty typed arrays can be frozen.
{
let ta = new Int32Array(EMPTY);
Object.freeze(ta);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), true);
assertEq(Object.isFrozen(ta), true);
}
// Non-empty typed arrays cannot be frozen.
for (let length of [INLINE_STORAGE, NON_INLINE_STORAGE]) {
let ta = new Int32Array(length);
assertThrowsInstanceOf(() => Object.freeze(ta), TypeError);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), false);
assertEq(Object.isFrozen(ta), false);
}
// Non-extensible empty typed arrays are sealed and frozen.
{
let ta = new Int32Array(EMPTY);
Object.preventExtensions(ta);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), true);
assertEq(Object.isFrozen(ta), true);
}
// Non-extensible non-empty typed arrays are neither sealed nor frozen.
for (let length of [INLINE_STORAGE, NON_INLINE_STORAGE]) {
let ta = new Int32Array(length);
Object.preventExtensions(ta);
assertEq(Object.isExtensible(ta), false);
assertEq(Object.isSealed(ta), false);
assertEq(Object.isFrozen(ta), false);
}
if (typeof reportCompare === "function")
reportCompare(true, true);