// 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.

// @dart = 2.9

/// @assertion E first
/// ...
/// Otherwise returns the first element in the iteration order, equivalent to
/// this.elementAt(0).
/// @description Checks that this method is equivalent to this.elementAt(0).
/// @author ngl@unipro.ru


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

Float64x2 f64x2(v) => new Float64x2.splat(v);

void check(List<Float64x2> list) {
  var l = new Float64x2List.fromList(list);
  Expect.equals(l.elementAt(0).x, l.first.x);
  Expect.equals(l.elementAt(0).y, l.first.y);
}

void checkClear(length) {
  var l = new Float64x2List(length);
  Expect.equals(l.elementAt(0).x, l.first.x);
  Expect.equals(l.elementAt(0).y, l.first.y);
}

main() {
  check([f64x2(1.0)]);
  check([f64x2(1.0), f64x2(2.0), f64x2(3.0), f64x2(4.0), f64x2(5.0)]);
  check([
    f64x2(1.0), f64x2(0.0), f64x2(0.0), f64x2(0.0), f64x2(0.0), f64x2(0.0),
    f64x2(0.0), f64x2(0.0), f64x2(0.0), f64x2(0.0), f64x2(0.0), f64x2(0.0),
    f64x2(0.0), f64x2(0.0), f64x2(0.0)
  ]);

  checkClear(1);
  checkClear(100);
}