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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArray/prototype/slice/bit-precision.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/slice/bit-precision.js b/js/src/tests/test262/built-ins/TypedArray/prototype/slice/bit-precision.js new file mode 100644 index 0000000000..1b4348e330 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArray/prototype/slice/bit-precision.js @@ -0,0 +1,41 @@ +// 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.slice +description: Preservation of bit-level encoding +info: | + [...] + 15. Else if count > 0, then + [...] + e. NOTE: If srcType and targetType are the same, the transfer must be + performed in a manner that preserves the bit-level encoding of the + source data. + f. Let srcByteOffet be the value of O's [[ByteOffset]] internal slot. + g. Let targetByteIndex be A's [[ByteOffset]] internal slot. + h. Let srcByteIndex be (k × elementSize) + srcByteOffet. + i. Let limit be targetByteIndex + count × elementSize. + j. Repeat, while targetByteIndex < limit + i. Let value be GetValueFromBuffer(srcBuffer, srcByteIndex, "Uint8"). + ii. Perform SetValueInBuffer(targetBuffer, targetByteIndex, "Uint8", + value). + iii. Increase srcByteIndex by 1. + iv. Increase targetByteIndex by 1. +includes: [nans.js, compareArray.js, testTypedArray.js] +features: [TypedArray] +---*/ + +function body(FloatArray) { + var subject = new FloatArray(NaNs); + var sliced, subjectBytes, slicedBytes; + + sliced = subject.slice(); + + subjectBytes = new Uint8Array(subject.buffer); + slicedBytes = new Uint8Array(sliced.buffer); + + assert(compareArray(subjectBytes, slicedBytes)); +} + +testWithTypedArrayConstructors(body, [Float32Array, Float64Array]); + +reportCompare(0, 0); |