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comparison: js/src/tests/ecma_6/Generators/delegating-yield-6.js
js/src/tests/ecma_6/Generators/delegating-yield-6.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a20628bf3064 |
|---|---|
| 1 // Test that each yield* loop just checks "done", and "value" is only | |
| 2 // fetched once at the end. | |
| 3 | |
| 4 var log = ""; | |
| 5 | |
| 6 function collect_results(iter) { | |
| 7 var ret = []; | |
| 8 var result; | |
| 9 do { | |
| 10 result = iter.next(); | |
| 11 ret.push(result); | |
| 12 } while (!result.done); | |
| 13 return ret; | |
| 14 } | |
| 15 | |
| 16 function Iter(val, count) { | |
| 17 function next() { | |
| 18 log += 'n'; | |
| 19 return { | |
| 20 get done() { log += "d"; return count-- == 0; }, | |
| 21 get value() { log += "v"; return val; } | |
| 22 } | |
| 23 } | |
| 24 | |
| 25 function iterator() { | |
| 26 log += 'i'; | |
| 27 return this; | |
| 28 } | |
| 29 | |
| 30 this.next = next; | |
| 31 this[std_iterator] = iterator; | |
| 32 } | |
| 33 | |
| 34 function* delegate(iter) { return yield* iter; } | |
| 35 | |
| 36 var inner = new Iter(42, 5); | |
| 37 var outer = delegate(inner); | |
| 38 | |
| 39 // Five values, and one terminal value. | |
| 40 outer.next(); | |
| 41 outer.next(); | |
| 42 outer.next(); | |
| 43 outer.next(); | |
| 44 outer.next(); | |
| 45 outer.next(); | |
| 46 | |
| 47 assertEq(log, "indndndndndndv"); | |
| 48 | |
| 49 // Outer's dead, man. Outer's dead. | |
| 50 assertDeepEq(outer.next(), {value: undefined, done: true}); | |
| 51 | |
| 52 // No more checking the iterator. | |
| 53 assertEq(log, "indndndndndndv"); | |
| 54 | |
| 55 if (typeof reportCompare == "function") | |
| 56 reportCompare(true, true); |
