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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | 1x 1x 1x 1x 1x 1x 1x | /**
* Currently, The `Optional chaining` will be counted as:
* ✅ bytes coverage
* ✅ lines coverage
* ❌ not branches coverage
*/
const adventurer = {
name: 'Alice',
cat: {
name: 'Dinah'
}
};
// obj.val?.prop
// obj.val?.[expr]
// obj.func?.(args)
function OptionalChaining() {
console.log(adventurer.cat?.name);
// Expected output: undefined
console.log(adventurer.dog?.name);
// Expected output: undefined
console.log(adventurer.someNonExistentMethod?.());
console.log(adventurer.cat?.first?.second);
}
module.exports = () => {
OptionalChaining();
};
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