michael@0: // Test yield* with iter.next and monkeypatching.
michael@0: 
michael@0: function* g(n) { for (var i=0; i<n; i++) yield i; }
michael@0: function* delegate(iter) { return yield* iter; }
michael@0: var GeneratorObjectPrototype = Object.getPrototypeOf(g).prototype;
michael@0: var GeneratorObjectPrototype_next = GeneratorObjectPrototype.next;
michael@0: 
michael@0: // Monkeypatch next on an iterator.
michael@0: var inner = g(20);
michael@0: var outer = delegate(inner);
michael@0: assertIteratorNext(outer, 0);
michael@0: assertIteratorNext(outer, 1);
michael@0: inner.next = function() { return 0; };
michael@0: // 42 yielded directly without re-boxing.
michael@0: assertEq(0, outer.next());
michael@0: // Outer generator not terminated.
michael@0: assertEq(0, outer.next());
michael@0: // Restore.
michael@0: inner.next = GeneratorObjectPrototype_next;
michael@0: assertIteratorNext(outer, 2);
michael@0: // Repatch.
michael@0: inner.next = function() { return { value: 42, done: true }; };
michael@0: assertIteratorDone(outer, 42);
michael@0: 
michael@0: // Monkeypunch next on the prototype.
michael@0: var inner = g(20);
michael@0: var outer = delegate(inner);
michael@0: assertIteratorNext(outer, 0);
michael@0: assertIteratorNext(outer, 1);
michael@0: GeneratorObjectPrototype.next = function() { return 0; };
michael@0: // 42 yielded directly without re-boxing.
michael@0: assertEq(0, GeneratorObjectPrototype_next.call(outer));
michael@0: // Outer generator not terminated.
michael@0: assertEq(0, GeneratorObjectPrototype_next.call(outer));
michael@0: // Restore.
michael@0: GeneratorObjectPrototype.next = GeneratorObjectPrototype_next;
michael@0: assertIteratorNext(outer, 2);
michael@0: 
michael@0: if (typeof reportCompare == "function")
michael@0:     reportCompare(true, true);