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// |reftest| shell-option(--enable-iterator-sequencing) skip-if(!Iterator.concat||!xulRuntime.shell) -- iterator-sequencing is not enabled unconditionally, requires shell-options
// Copyright (C) 2024 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-iterator.concat
description: >
Iterator.concat when called with a single argument.
info: |
Iterator.concat ( ...items )
1. Let iterables be a new empty List.
2. For each element item of items, do
...
3. Let closure be a new Abstract Closure with no parameters that captures iterables and performs the following steps when called:
a. For each Record iterable of iterables, do
...
b. Return ReturnCompletion(undefined).
...
6. Return gen.
features: [iterator-sequencing]
---*/
let array = [1, 2, 3];
let iterator = Iterator.concat(array);
for (let i = 0; i < array.length; i++) {
let iterResult = iterator.next();
assert.sameValue(iterResult.done, false);
assert.sameValue(iterResult.value, array[i]);
}
let iterResult = iterator.next();
assert.sameValue(iterResult.done, true);
assert.sameValue(iterResult.value, undefined);
reportCompare(0, 0);