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add test that concat does not pass arg through when called with 1 arg

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Michael Ficarra 2024-11-21 17:11:46 -07:00 committed by Philip Chimento
parent a12abf58af
commit d5a09f40e4
1 changed files with 5 additions and 1 deletions
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6
test/built-ins/Iterator/concat/result-is-iterator.js
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@ -1,4 +1,4 @@
// Copyright (C) 2024 André Bargull. All rights reserved.
// Copyright (C) 2024 André Bargull and Michael Ficarra. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
@ -11,3 +11,7 @@ features: [iterator-sequencing]
var iter = Iterator.concat();
assert(iter instanceof Iterator, "Iterator.concat() must return an Iterator");
var customIter = { next() { return { done: true, value: undefined }; } };
iter = Iterator.concat({ [Symbol.iterator]() { return customIter; } });
assert(iter instanceof Iterator, "Iterator.concat(...) must return an Iterator");