comparison_with_undefined: { options = { comparisons: true, } input: { a == undefined; a != undefined; a === undefined; a !== undefined; undefined == a; undefined != a; undefined === a; undefined !== a; void 0 == a; void 0 != a; void 0 === a; void 0 !== a; } expect: { null == a; null != a; void 0 === a; void 0 !== a; null == a; null != a; void 0 === a; void 0 !== a; null == a; null != a; void 0 === a; void 0 !== a; } }