mirror of
https://github.com/tc39/test262.git
synced 2025-05-16 04:40:42 +02:00
3bdc467c51
- fixed a false positive where argument-passed-null.js was returning a TypeError from 22.1.2.1 step 5 - created 2 tests from argument-passed-null to assert this as null and items as null - fixed reference info on Array.from_arity.js - fix tests at Array.from_forwards-length-for-array-likes - static checks on calling-from-valid-1-onlyStrict.js - static checks on calling-from-valid-1-noStrict.js - static checks on calling-from-valid-2.js - removed create-typedarray-from.js, that test belong to es6id 22.2.2.1 - removed mapfn-invalid-typeerror-1.js - false positive from 22.1.2.1 step 5 - moved mapfn-invalid-typeerror-2.js to more spread tests where mapfn is not callable - ...
35 lines
882 B
JavaScript
35 lines
882 B
JavaScript
// Copyright (c) 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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/*---
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es6id: 22.1.2.1
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description: >
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If this is a constructor, and items doesn't have an @@iterator,
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returns a new instance of this
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info: >
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22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
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4. Let usingIterator be GetMethod(items, @@iterator).
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...
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6. If usingIterator is not undefined, then
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...
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12. If IsConstructor(C) is true, then
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a. Let A be Construct(C, «len»).
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13. Else,
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a. Let A be ArrayCreate(len).
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...
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19. Return A.
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---*/
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var result;
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function MyCollection() {
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this.args = arguments;
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}
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result = Array.from.call(MyCollection, {length: 42});
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assert.sameValue(result.args.length, 1);
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assert.sameValue(result.args[0], 42);
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assert(result instanceof MyCollection);
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