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comparison: js/src/tests/ecma_6/Generators/delegating-yield-3.js
js/src/tests/ecma_6/Generators/delegating-yield-3.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:5d5523ec56de |
|---|---|
| 1 // Test yield* with iter.next and monkeypatching. | |
| 2 | |
| 3 function* g(n) { for (var i=0; i<n; i++) yield i; } | |
| 4 function* delegate(iter) { return yield* iter; } | |
| 5 var GeneratorObjectPrototype = Object.getPrototypeOf(g).prototype; | |
| 6 var GeneratorObjectPrototype_next = GeneratorObjectPrototype.next; | |
| 7 | |
| 8 // Monkeypatch next on an iterator. | |
| 9 var inner = g(20); | |
| 10 var outer = delegate(inner); | |
| 11 assertIteratorNext(outer, 0); | |
| 12 assertIteratorNext(outer, 1); | |
| 13 inner.next = function() { return 0; }; | |
| 14 // 42 yielded directly without re-boxing. | |
| 15 assertEq(0, outer.next()); | |
| 16 // Outer generator not terminated. | |
| 17 assertEq(0, outer.next()); | |
| 18 // Restore. | |
| 19 inner.next = GeneratorObjectPrototype_next; | |
| 20 assertIteratorNext(outer, 2); | |
| 21 // Repatch. | |
| 22 inner.next = function() { return { value: 42, done: true }; }; | |
| 23 assertIteratorDone(outer, 42); | |
| 24 | |
| 25 // Monkeypunch next on the prototype. | |
| 26 var inner = g(20); | |
| 27 var outer = delegate(inner); | |
| 28 assertIteratorNext(outer, 0); | |
| 29 assertIteratorNext(outer, 1); | |
| 30 GeneratorObjectPrototype.next = function() { return 0; }; | |
| 31 // 42 yielded directly without re-boxing. | |
| 32 assertEq(0, GeneratorObjectPrototype_next.call(outer)); | |
| 33 // Outer generator not terminated. | |
| 34 assertEq(0, GeneratorObjectPrototype_next.call(outer)); | |
| 35 // Restore. | |
| 36 GeneratorObjectPrototype.next = GeneratorObjectPrototype_next; | |
| 37 assertIteratorNext(outer, 2); | |
| 38 | |
| 39 if (typeof reportCompare == "function") | |
| 40 reportCompare(true, true); |
