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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/bit-precision.js | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/bit-precision.js b/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/bit-precision.js new file mode 100644 index 0000000000..f563d813ef --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/bit-precision.js @@ -0,0 +1,46 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-%typedarray%.prototype.copywithin +description: Preservation of bit-level encoding +info: | + Array.prototype.copyWithin (target, start [ , end ] ) + + 12. Repeat, while count > 0 + [...] + d. If fromPresent is true, then + i. Let fromVal be ? Get(O, fromKey). + ii. Perform ? Set(O, toKey, fromVal, true). +includes: [nans.js, compareArray.js, testTypedArray.js] +features: [TypedArray] +---*/ + +function body(FloatArray) { + var subject = new FloatArray(NaNs.length * 2); + + NaNs.forEach(function(v, i) { + subject[i] = v; + }); + + var originalBytes, copiedBytes; + var length = NaNs.length * FloatArray.BYTES_PER_ELEMENT; + + originalBytes = new Uint8Array( + subject.buffer, + 0, + length + ); + + subject.copyWithin(NaNs.length, 0); + copiedBytes = new Uint8Array( + subject.buffer, + length + ); + + assert(compareArray(originalBytes, copiedBytes)); +} + +testWithTypedArrayConstructors(body, [Float32Array, Float64Array]); + +reportCompare(0, 0); |