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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: () => {} };
obj[globalOther]();
}, 'unknown missing property');
assertThrows(() => {
const obj = { first: () => {} };
delete obj[globalFirst];
obj.first();
}, 'known property that might be missing');
assertThrows(() => {
const obj = { first: () => {} };
delete obj.first;
obj.first.second();
}, 'known property that is missing');
assertThrows(() => {
const obj = { set first(value) {} };
obj.first.second();
}, 'property without getter');
assertThrows(() => {
const obj = {};
obj.hasOwnProperty.second('first');
}, 'sub-property of object method');
assertThrows(() => {
const obj = {};
obj.first();
}, 'missing property');
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