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2 years ago
module.exports = function properlyBoxed(method) {
// Check node 0.6.21 bug where third parameter is not boxed
var properlyBoxesNonStrict = true;
var properlyBoxesStrict = true;
var threwException = false;
if (typeof method === 'function') {
try {
// eslint-disable-next-line max-params
method.call('f', function (_, __, O) {
if (typeof O !== 'object') {
properlyBoxesNonStrict = false;
}
});
method.call(
[null],
function () {
'use strict';
properlyBoxesStrict = typeof this === 'string'; // eslint-disable-line no-invalid-this
},
'x'
);
} catch (e) {
threwException = true;
}
return !threwException && properlyBoxesNonStrict && properlyBoxesStrict;
}
return false;
};