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function assertThrows(callback, description) {
let thrown = false;
try {
callback();
} catch (err) {
thrown = true;
}
assert.ok(thrown, description);
}
assertThrows(() => {
const obj = { first: { second: 0} };
obj[globalOther].second = 1;
}, 'sub-property of unknown property');
assertThrows(() => {
const obj = { first: { second: 0} };
delete obj.first;
obj.first.second = 1;
}, 'sub-property of reassigned property');
assertThrows(() => {
const obj = {};
obj.first.second = 1;
}, 'sub-property of missing property');
assertThrows(() => {
const obj4 = { set first(value) {} };
obj4.first.second = 1;
}, 'sub-property of property without getter');
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