LibTest/typed_data/ByteData/getUint64_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 int getUint64(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN])
 * Returns the positive integer represented by the eight bytes starting
 * at the specified [byteOffset] in this object, in unsigned binary
 * form. The return value will be between 0 and  2<sup>64</sup> - 1, inclusive.
 * @description Checks that the correct value is returned.
 * @author msyabro
 */

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

main() {
  var u64 = new Uint64List.fromList([0, 1, 9223372036854775807, 18446744073709551615, 12, 54, 100, 23, 98, 23, 43, 15, 3]);
  var u32 = new Uint32List.fromList([0x62e7a17b, 0xf7ec7100, 0xe7180101, 0x1f83ccbb]);

  var byteDataFromU64 = new ByteData.view(u64.buffer);
  for(int i = 0; i < byteDataFromU64.lengthInBytes / Uint64List.BYTES_PER_ELEMENT; ++i) {
    Expect.equals(u64[i], byteDataFromU64.getUint64(i*Uint64List.BYTES_PER_ELEMENT, Endianness.LITTLE_ENDIAN));
  }

  var byteDataFromU32 = new ByteData.view(u32.buffer);
  var expectedBigEndian = [8908655946015829239, 72366452581892895];
  var expectedLittleEndian = [17864778068345201019, 2270883744532922625];
  for(int i = 0; i < byteDataFromU32.lengthInBytes / Uint64List.BYTES_PER_ELEMENT; ++i) {
    Expect.equals(expectedBigEndian[i], byteDataFromU32.getUint64(i*Uint64List.BYTES_PER_ELEMENT, Endianness.BIG_ENDIAN));
    Expect.equals(expectedLittleEndian[i], byteDataFromU32.getUint64(i*Uint64List.BYTES_PER_ELEMENT, Endianness.LITTLE_ENDIAN));
  }
}