Set-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 + "iteration.js");

var g = newGlobal();

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

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

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

var setw = g.eval("new Set(['x', 'y'])");

assertIteratorNext(iterator_fn.call(setw), "x");

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

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

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

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

assertIteratorResult(next_fn.call(iterw), "x", false);

assertIteratorResult(next_fn.call(iterw), "y", false);

assertIteratorResult(next_fn.call(iterw), undefined, true);