mirror of https://github.com/tc39/test262.git
47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
// Copyright (C) 2015 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-array.from
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description: Setting length of object (traversed via iterator)
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info: |
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[...]
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6. If usingIterator is not undefined, then
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[...]
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g. Repeat
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[...]
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iv. If next is false, then
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1. Let setStatus be Set(A, "length", k, true).
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2. ReturnIfAbrupt(setStatus).
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3. Return A.
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features: [Symbol.iterator]
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---*/
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var items = {};
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var result, nextIterResult, lastIterResult;
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items[Symbol.iterator] = function() {
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return {
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next: function() {
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var result = nextIterResult;
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nextIterResult = lastIterResult;
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return result;
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}
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};
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};
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nextIterResult = lastIterResult = {
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done: true
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};
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result = Array.from(items);
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assert.sameValue(result.length, 0);
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nextIterResult = {
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done: false
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};
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lastIterResult = {
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done: true
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};
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result = Array.from(items);
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assert.sameValue(result.length, 1);
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