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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js b/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js new file mode 100644 index 0000000000..8bb73635ee --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js @@ -0,0 +1,41 @@ +// Copyright (c) 2014 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +/*--- +esid: sec-array.from +description: > + If this is a constructor, and items doesn't have an @@iterator, + returns a new instance of this +info: | + 22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] ) + + 4. Let usingIterator be GetMethod(items, @@iterator). + ... + 6. If usingIterator is not undefined, then + ... + 12. If IsConstructor(C) is true, then + a. Let A be Construct(C, «len»). + 13. Else, + a. Let A be ArrayCreate(len). + ... + 19. Return A. +---*/ + +var result; + +function MyCollection() { + this.args = arguments; +} + +result = Array.from.call(MyCollection, { + length: 42 +}); + +assert.sameValue(result.args.length, 1, 'The value of result.args.length is expected to be 1'); +assert.sameValue(result.args[0], 42, 'The value of result.args[0] is expected to be 42'); +assert( + result instanceof MyCollection, + 'The result of evaluating (result instanceof MyCollection) is expected to be true' +); + +reportCompare(0, 0); |