test262-automation e9a5a7f918 [javascriptcore-test262-automation] changes from git@github.com:WebKit/webkit.git at sha 949e26452cfa153a7f4afe593da97e2fe9e1b706 on Tue Jul 03 2018 14:35:15 GMT-0400 (Eastern Daylight Time) (#1620)
* [javascriptcore-test262-automation] changes from git@github.com:WebKit/webkit.git at sha 949e26452cfa153a7f4afe593da97e2fe9e1b706 on Tue Jul 03 2018 14:35:15 GMT-0400 (Eastern Daylight Time)
2018-07-03 15:59:58 -04:00

28 lines
834 B
JavaScript

function assert(a) {
if (!a)
throw Error("Bad assertion!");
}
function tryChangeNonConfigurableDescriptor(x) {
Object.defineProperty(arguments, 0, {configurable: false});
try {
Object.defineProperty(arguments, 0, x);
assert(false);
} catch(e) {
assert(e instanceof TypeError);
}
}
tryChangeNonConfigurableDescriptor({get: () => {return 50;} });
tryChangeNonConfigurableDescriptor({set: (x) => {}});
tryChangeNonConfigurableDescriptor({writable: true, enumerable: false});
function tryChangeWritableOfNonConfigurableDescriptor(x) {
Object.defineProperty(arguments, 0, {configurable: false});
Object.defineProperty(arguments, 0, {writable: true});
assert(Object.defineProperty(arguments, 0, {writable: false}));
}
tryChangeWritableOfNonConfigurableDescriptor("foo");