michael@0: // Test that a deep yield* chain re-yields received results without
michael@0: // re-boxing.
michael@0: 
michael@0: function results(results) {
michael@0:     var i = 0;
michael@0:     function next() {
michael@0:         return results[i++];
michael@0:     }
michael@0:     var iter = { next: next };
michael@0:     var ret = {};
michael@0:     ret[std_iterator] = function () { return iter; }
michael@0:     return ret;
michael@0: }
michael@0: 
michael@0: function* yield_results(expected, n) {
michael@0:     return yield* n ? yield_results(expected, n - 1) : results(expected);
michael@0: }
michael@0: 
michael@0: function collect_results(iterable) {
michael@0:     var ret = [];
michael@0:     var result;
michael@0:     var iter = iterable[std_iterator]();
michael@0:     do {
michael@0:         result = iter.next();
michael@0:         ret.push(result);
michael@0:     } while (!result.done);
michael@0:     return ret;
michael@0: }
michael@0: 
michael@0: // We have to put a full result for the end, because the return will re-box.
michael@0: var expected = [{value: 1}, 13, "foo", {value: 34, done: true}];
michael@0: 
michael@0: assertDeepEq(expected, collect_results(results(expected)));
michael@0: assertDeepEq(expected, collect_results(yield_results(expected, 20)));
michael@0: 
michael@0: if (typeof reportCompare == "function")
michael@0:     reportCompare(true, true);