Map-iterator-proxies-2.js

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// map.iterator() and iter.next() are non-generic but work on cross-compartment wrappers.

load(libdir + "asserts.js");

load(libdir + "eqArrayHelper.js");

load(libdir + "iteration.js");

var g = newGlobal();

var iterator_fn = Map.prototype[Symbol.iterator];

assertThrowsInstanceOf(function () { iterator_fn.call({}); }, TypeError);

assertThrowsInstanceOf(function () { iterator_fn.call(new Set()); }, TypeError);

var mapw = g.eval("new Map([['x', 1], ['y', 2]])");

assertEqArray(iterator_fn.call(mapw).next().value, ["x", 1]);

var next_fn = (new Map())[Symbol.iterator]().next;

assertThrowsInstanceOf(function () { next_fn.call({}); }, TypeError);

assertThrowsInstanceOf(function () { next_fn.call((new Set())[Symbol.iterator]()); }, TypeError);

var iterw = mapw[Symbol.iterator]();

assertEqArray(next_fn.call(iterw).value, ["x", 1]);

assertEqArray(next_fn.call(iterw).value, ["y", 2]);

assertEq(next_fn.call(iterw).done, true);