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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-generator-function-definitions-runtime-semantics-evaluation
es6id: 14.4.14
description: Invocation of iterator `next` method
info: |
YieldExpression : yield * AssignmentExpression
1. Let exprRef be the result of evaluating AssignmentExpression.
2. Let value be ? GetValue(exprRef).
3. Let iterator be ? GetIterator(value).
4. Let received be NormalCompletion(undefined).
5. Repeat
a. If received.[[Type]] is normal, then
i. Let innerResult be ? IteratorNext(iterator, received.[[Value]]).
7.4.2 IteratorNext
1. If value was not passed, then
[...]
2. Else,
a. Let result be ? Invoke(iterator, "next", « value »).
[...]
features: [generators, Symbol.iterator]
---*/
var args, thisValue;
var callCount = 0;
var spyIterator = {
next: function() {
callCount += 1;
args = arguments;
thisValue = this;
return { done: true };
}
};
var spyIterable = {};
spyIterable[Symbol.iterator] = function() {
return spyIterator;
};
function* g() {
yield * spyIterable;
}
var iter = g();
iter.next(9876);
assert.sameValue(callCount, 1);
assert.sameValue(args.length, 1);
assert.sameValue(args[0], undefined);
assert.sameValue(thisValue, spyIterator);
reportCompare(0, 0);