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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArray/prototype/with/index-negative.js | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/with/index-negative.js b/js/src/tests/test262/built-ins/TypedArray/prototype/with/index-negative.js new file mode 100644 index 0000000000..3ac59b6926 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArray/prototype/with/index-negative.js @@ -0,0 +1,31 @@ +// |reftest| shell-option(--enable-change-array-by-copy) skip-if(!Array.prototype.with||!xulRuntime.shell) -- change-array-by-copy is not enabled unconditionally, requires shell-options +// Copyright (C) 2021 Igalia, S.L. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-%typedarray%.prototype.with +description: > + %TypedArray%.prototype.with adds length to index if it's negative. +info: | + %TypedArray%.prototype.with ( index, value ) + + ... + 2. Let len be ? LengthOfArrayLike(O). + 3. Let relativeIndex be ? ToIntegerOrInfinity(index). + 4. If index >= 0, let actualIndex be relativeIndex. + 5. Else, let actualIndex be len + relativeIndex. + ... +features: [TypedArray, change-array-by-copy] +includes: [testTypedArray.js, compareArray.js] +---*/ + +testWithTypedArrayConstructors(TA => { + var arr = new TA([0, 1, 2]); + + assert.compareArray(arr.with(-1, 4), [0, 1, 4]); + assert.compareArray(arr.with(-3, 4), [4, 1, 2]); + // -0 is not negative. + assert.compareArray(arr.with(-0, 4), [4, 1, 2]); +}); + +reportCompare(0, 0); |