LibTest/typed_data/ByteData/setInt32_A01_t01.dart

/*
 * Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion void setInt32(int byteOffset, int value, [Endianness endian = Endianness.BIG_ENDIAN])
 * Sets the four bytes starting at the specified [byteOffset] in this
 * object to the two's complement binary representation of the specified
 * [value], which must fit in four bytes. In other words, [value] must lie
 * between 2<sup>31</sup> and 2<sup>31</sup> - 1, inclusive.
 * @description Checks that the value at the [offset] is set to [value].
 * @author msyabro
 */

import "dart:typed_data";
import "../../../Utils/expect.dart";

main() {
  var i32 = new Int32List(16);
  var valuesToBeSet = [123, -95, -25, 98, 0, 113, -20, -9, 1, 2147483647, -2147483648, -25, -69, -52, -125, 31];
  var expectedBigEndian =
    [2063597568, -1577058305, -402653185, 1644167168, 0, 1895825408, -318767105,
    -134217729, 16777216, -129, 128, -402653185, -1140850689, -855638017, -2080374785, 520093696];

  var byteDataFromI32 = new ByteData.view(i32.buffer);
  for(int i = 0; i < byteDataFromI32.lengthInBytes / Int32List.BYTES_PER_ELEMENT; ++i) {
    byteDataFromI32.setInt32(i * Int32List.BYTES_PER_ELEMENT, valuesToBeSet[i], Endianness.LITTLE_ENDIAN);
  }
  Expect.listEquals(valuesToBeSet, i32);

  for(int i = 0; i < byteDataFromI32.lengthInBytes / Int32List.BYTES_PER_ELEMENT; ++i) {
    byteDataFromI32.setInt32(i * Int32List.BYTES_PER_ELEMENT, valuesToBeSet[i]);
  }
  Expect.listEquals(expectedBigEndian, i32);
}