LibTest/typed_data/Float64x2List/Float64x2List.view_A02_t01.dart

// Copyright (c) 2017, 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
/// Float64x2List.view(
///     ByteBuffer buffer, [
///     int offsetInBytes = 0,
///     int length
/// ])
/// Changes in the Float64x2List will be visible in the byte buffer and vice
/// versa.
/// @description Checks that changes done in the Float64x2List is seen in the
/// buffer and vice versa.
/// @author ngl@unipro.ru


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

Float64x2 f64x2V(v) => new Float64x2.splat(v);

main() {
  var tmp = new Float64x2List.fromList([f64x2V(1.0), f64x2V(2.0), f64x2V(3.0)]);
  var byteBuffer = tmp.buffer;
  Float64x2List l = new Float64x2List.view(byteBuffer, 0, 3);

  l[0] = f64x2V(11.0);
  tmp[1] = f64x2V(12.0);

  Expect.equals(l[0].x, tmp[0].x);
  Expect.equals(l[0].y, tmp[0].y);

  Expect.equals(tmp[1].x, l[1].x);
  Expect.equals(tmp[1].y, l[1].y);
}