LibTest/typed_data/ByteData/setUint32_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 setUint32(
 *     int byteOffset,
 *     int value, [
 *     Endian endian = Endian.big
 * ])
 * Sets the four bytes starting at the specified [byteOffset] in this object to
 * the unsigned binary representation of the specified [value], which must fit
 * in four bytes.
 * In other words, [value] must be between 0 and pow(2, 32) - 1, inclusive.
 * @description Checks that the value at the [byteOffset] is set to [value].
 * @author msyabro
 */

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

main() {
  var u32 = new Uint32List(16);
  var valuesToBeSet = [
    123, 95, 25, 98, 0, 113, 20, 9, 1, 4294967295, 2147483648, 25, 69, 52,
    125, 31
  ];
  var expectedBigEndian = [
    2063597568, 1593835520, 419430400, 1644167168, 0, 1895825408, 335544320,
    150994944, 16777216, 4294967295, 128, 419430400, 1157627904, 872415232,
    2097152000, 520093696
  ];
  int bytesInElement = Int32List.bytesPerElement;

  var byteDataFromU32 = new ByteData.view(u32.buffer);
  for (int i = 0; i < byteDataFromU32.lengthInBytes / bytesInElement; ++i) {
    byteDataFromU32.setUint32(i * bytesInElement, valuesToBeSet[i],
        Endian.little);
  }
  Expect.listEquals(valuesToBeSet, u32);

  for (int i = 0; i < byteDataFromU32.lengthInBytes / bytesInElement; ++i) {
    byteDataFromU32.setUint32(i * bytesInElement, valuesToBeSet[i]);
  }
  Expect.listEquals(expectedBigEndian, u32);
}