JSTests/test262/test/built-ins/TypedArrayConstructors/internals/DefineOwnProperty/conversion-operation.js

// 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-integer-indexed-exotic-objects-defineownproperty-p-desc
description: >
  Verify conversion after defining value
info: |
  9.4.5.3 [[DefineOwnProperty]] ( P, Desc)

  ...
  3. If Type(P) is String, then
    ...
    b. If numericIndex is not undefined, then
      ...
      xi. If Desc has a [[Value]] field, then
        1. Let value be Desc.[[Value]].
        2. Return ? IntegerIndexedElementSet(O, intIndex, value).
  ...

  IntegerIndexedElementSet ( O, index, value )

  Assert: O is an Integer-Indexed exotic object.
  If O.[[ContentType]] is BigInt, let numValue be ? ToBigInt(value).
  Otherwise, let numValue be ? ToNumber(value).
  Let buffer be O.[[ViewedArrayBuffer]].
  If IsDetachedBuffer(buffer) is false and ! IsValidIntegerIndex(O, index) is true, then
    Let offset be O.[[ByteOffset]].
    Let arrayTypeName be the String value of O.[[TypedArrayName]].
    Let elementSize be the Element Size value specified in Table 62 for arrayTypeName.
    Let indexedPosition be (ℝ(index) × elementSize) + offset.
    Let elementType be the Element Type value in Table 62 for arrayTypeName.
    Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue, true, Unordered).
  Return NormalCompletion(undefined).

  24.1.1.6 SetValueInBuffer ( arrayBuffer, byteIndex, type, value [ ,
  isLittleEndian ] )

  ...
  8. If type is "Float32", then
    ...
  9. Else, if type is "Float64", then
    ...
  10. Else,
    ...
    b. Let convOp be the abstract operation named in the Conversion Operation
    column in Table 50 for Element Type type.
    c. Let intValue be convOp(value).
    d. If intValue ≥ 0, then
      ...
    e. Else,
      ...
includes: [byteConversionValues.js, testTypedArray.js]
features: [TypedArray]
---*/

testTypedArrayConversions(byteConversionValues, function(TA, value, expected, initial) {
  var sample = new TA([initial]);

  Object.defineProperty(sample, "0", {value: value});

  assert.sameValue(sample[0], expected, value + " converts to " + expected);
});