// new Map(arr) throws if arr contains holes (or undefined values). load(libdir + "asserts.js"); assertThrowsInstanceOf(function () { new Map([undefined]); }, TypeError); assertThrowsInstanceOf(function () { new Map([null]); }, TypeError); assertThrowsInstanceOf(function () { new Map([[0, 0], [1, 1], , [3, 3]]); }, TypeError); assertThrowsInstanceOf(function () { new Map([[0, 0], [1, 1], ,]); }, TypeError); // new Map(iterable) throws if iterable doesn't have array-like objects assertThrowsInstanceOf(function () { new Map([1, 2, 3]); }, TypeError); assertThrowsInstanceOf(function () { let s = new Set([1, 2, "abc"]); new Map(s); }, TypeError);