mirror of https://github.com/tc39/test262.git
44 lines
1.2 KiB
JavaScript
44 lines
1.2 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: Abrupt completion returned when invoking the @@iterator 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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7.4.1 GetIterator
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1. If method was not passed, then
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a. Let method be ? GetMethod(obj, @@iterator).
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2. Let iterator be ? Call(method, obj).
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features: [generators, Symbol.iterator]
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---*/
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var thrown = new Test262Error();
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var badIter = {};
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badIter[Symbol.iterator] = function() {
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throw thrown;
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};
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function* g() {
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try {
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yield * badIter;
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} catch (err) {
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caught = err;
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}
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}
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var iter = g();
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var result, caught;
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assert.sameValue(caught, undefined, 'method is not invoked eagerly');
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result = iter.next();
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assert.sameValue(result.value, undefined, 'iteration value');
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assert.sameValue(result.done, true, 'iteration status');
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assert.sameValue(caught, thrown, 'error value');
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