diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js new file mode 100644 index 0000000000..757ff87241 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js @@ -0,0 +1,26 @@ +// Copyright (C) 2020 Rick Waldron. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-array.prototype.at +description: > + Returns undefined if the specified index less than or greater than the available index range. +info: | + Array.prototype.at( index ) + + If k < 0 or k ≥ len, then return undefined. +features: [Array.prototype.at] +---*/ +assert.sameValue( + typeof Array.prototype.at, + 'function', + 'The value of `typeof Array.prototype.at` is expected to be "function"' +); + +let a = []; + +assert.sameValue(a.at(-2), undefined, 'a.at(-2) returns undefined'); // wrap around the end +assert.sameValue(a.at(0), undefined, 'a.at(0) returns undefined'); +assert.sameValue(a.at(1), undefined, 'a.at(1) returns undefined'); + + +reportCompare(0, 0); |