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-6.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,56 @@
     1.4 +// Test that each yield* loop just checks "done", and "value" is only
     1.5 +// fetched once at the end.
     1.6 +
     1.7 +var log = "";
     1.8 +
     1.9 +function collect_results(iter) {
    1.10 +    var ret = [];
    1.11 +    var result;
    1.12 +    do {
    1.13 +        result = iter.next();
    1.14 +        ret.push(result);
    1.15 +    } while (!result.done);
    1.16 +    return ret;
    1.17 +}
    1.18 +
    1.19 +function Iter(val, count) {
    1.20 +    function next() {
    1.21 +        log += 'n';
    1.22 +        return {
    1.23 +            get done() { log += "d"; return count-- == 0; },
    1.24 +            get value() { log += "v"; return val; }
    1.25 +        }
    1.26 +    }
    1.27 +
    1.28 +    function iterator() {
    1.29 +        log += 'i';
    1.30 +        return this;
    1.31 +    }
    1.32 +
    1.33 +    this.next = next;
    1.34 +    this[std_iterator] = iterator;
    1.35 +}
    1.36 +
    1.37 +function* delegate(iter) { return yield* iter; }
    1.38 +
    1.39 +var inner = new Iter(42, 5);
    1.40 +var outer = delegate(inner);
    1.41 +
    1.42 +// Five values, and one terminal value.
    1.43 +outer.next();
    1.44 +outer.next();
    1.45 +outer.next();
    1.46 +outer.next();
    1.47 +outer.next();
    1.48 +outer.next();
    1.49 +
    1.50 +assertEq(log, "indndndndndndv");
    1.51 +
    1.52 +// Outer's dead, man.  Outer's dead.
    1.53 +assertDeepEq(outer.next(), {value: undefined, done: true});
    1.54 +
    1.55 +// No more checking the iterator.
    1.56 +assertEq(log, "indndndndndndv");
    1.57 +
    1.58 +if (typeof reportCompare == "function")
    1.59 +    reportCompare(true, true);