The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/ecma_6/Generators/delegating-yield-5.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,37 @@
     1.4 +// Test that a deep yield* chain re-yields received results without
     1.5 +// re-boxing.
     1.6 +
     1.7 +function results(results) {
     1.8 +    var i = 0;
     1.9 +    function next() {
    1.10 +        return results[i++];
    1.11 +    }
    1.12 +    var iter = { next: next };
    1.13 +    var ret = {};
    1.14 +    ret[std_iterator] = function () { return iter; }
    1.15 +    return ret;
    1.16 +}
    1.17 +
    1.18 +function* yield_results(expected, n) {
    1.19 +    return yield* n ? yield_results(expected, n - 1) : results(expected);
    1.20 +}
    1.21 +
    1.22 +function collect_results(iterable) {
    1.23 +    var ret = [];
    1.24 +    var result;
    1.25 +    var iter = iterable[std_iterator]();
    1.26 +    do {
    1.27 +        result = iter.next();
    1.28 +        ret.push(result);
    1.29 +    } while (!result.done);
    1.30 +    return ret;
    1.31 +}
    1.32 +
    1.33 +// We have to put a full result for the end, because the return will re-box.
    1.34 +var expected = [{value: 1}, 13, "foo", {value: 34, done: true}];
    1.35 +
    1.36 +assertDeepEq(expected, collect_results(results(expected)));
    1.37 +assertDeepEq(expected, collect_results(yield_results(expected, 20)));
    1.38 +
    1.39 +if (typeof reportCompare == "function")
    1.40 +    reportCompare(true, true);