mirror of https://github.com/tc39/test262.git
40 lines
1.0 KiB
JavaScript
40 lines
1.0 KiB
JavaScript
// 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: >
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Iteration protocol is not initiated for non-delegating YieldExpression
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info: |
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YieldExpression:yieldAssignmentExpression
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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. Return ? GeneratorYield(CreateIterResultObject(value, false)).
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features: [generators, Symbol.iterator]
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---*/
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var callCount = 0;
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var iterSpy = Object.defineProperty({}, Symbol.iterator, {
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get: function() {
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callCount += 1;
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}
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});
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function* g() {
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yield iterSpy;
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}
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var iter = g();
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var result;
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result = iter.next();
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assert.sameValue(result.value, iterSpy);
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assert.sameValue(result.done, false);
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assert.sameValue(callCount, 0);
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result = iter.next();
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assert.sameValue(result.value, undefined);
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assert.sameValue(result.done, true);
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assert.sameValue(callCount, 0);
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