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function testTestIntegrityLevel(a, hasElems) {
assertEq(Object.isExtensible(a), true);
assertEq(Object.isSealed(a), false);
assertEq(Object.isFrozen(a), false);
Object.preventExtensions(a);
assertEq(Object.isExtensible(a), false);
assertEq(Object.isSealed(a), !hasElems);
assertEq(Object.isFrozen(a), false);
Object.seal(a);
assertEq(Object.isExtensible(a), false);
assertEq(Object.isSealed(a), true);
assertEq(Object.isFrozen(a), false);
Object.freeze(a);
assertEq(Object.isExtensible(a), false);
assertEq(Object.isSealed(a), true);
assertEq(Object.isFrozen(a), true);
}
testTestIntegrityLevel([1, 2, 3], true);
testTestIntegrityLevel([1, , , 2], true);
testTestIntegrityLevel([1, , , ], true);
testTestIntegrityLevel([, , , ], false);
testTestIntegrityLevel([], false);
testTestIntegrityLevel({0: 0}, true);
var a = [,,,,,,, 1];
a.pop();
testTestIntegrityLevel(a, false);
function testDescriptor() {
var a = [1];
Object.preventExtensions(a);
assertEq(JSON.stringify(Object.getOwnPropertyDescriptors(a)),
`{"0":{"value":1,"writable":true,"enumerable":true,"configurable":true},` +
`"length":{"value":1,"writable":true,"enumerable":false,"configurable":false}}`);
a = [1];
Object.seal(a);
assertEq(JSON.stringify(Object.getOwnPropertyDescriptors(a)),
`{"0":{"value":1,"writable":true,"enumerable":true,"configurable":false},` +
`"length":{"value":1,"writable":true,"enumerable":false,"configurable":false}}`);
a = [1];
Object.freeze(a);
assertEq(JSON.stringify(Object.getOwnPropertyDescriptors(a)),
`{"0":{"value":1,"writable":false,"enumerable":true,"configurable":false},` +
`"length":{"value":1,"writable":false,"enumerable":false,"configurable":false}}`);
}
testDescriptor();
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