mirror of https://github.com/tc39/test262.git
53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-generator-function-definitions-runtime-semantics-evaluation
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es6id: 14.4.14
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description: Invocation of iterator `next` method
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info: |
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YieldExpression : yield * AssignmentExpression
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1. Let exprRef be the result of evaluating AssignmentExpression.
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2. Let value be ? GetValue(exprRef).
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3. Let iterator be ? GetIterator(value).
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4. Let received be NormalCompletion(undefined).
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5. Repeat
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a. If received.[[Type]] is normal, then
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i. Let innerResult be ? IteratorNext(iterator, received.[[Value]]).
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7.4.2 IteratorNext
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1. If value was not passed, then
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[...]
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2. Else,
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a. Let result be ? Invoke(iterator, "next", « value »).
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[...]
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features: [Symbol.iterator]
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---*/
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var args, thisValue;
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var callCount = 0;
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var spyIterator = {
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next: function() {
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callCount += 1;
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args = arguments;
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thisValue = this;
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return { done: true };
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}
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};
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var spyIterable = {};
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spyIterable[Symbol.iterator] = function() {
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return spyIterator;
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};
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function* g() {
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yield * spyIterable;
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}
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var iter = g();
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iter.next(9876);
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assert.sameValue(callCount, 1);
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assert.sameValue(args.length, 1);
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assert.sameValue(args[0], undefined);
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assert.sameValue(thisValue, spyIterator);
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