LibTest/typed_data/Float64x2List/retainWhere_A01_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.

// @dart = 2.9

/// @assertion void retainWhere(bool test(E element))
/// Removes all objects from this list that fail to satisfy test.
/// ...
/// Throws an UnsupportedError if this is a fixed-length list.
/// @description Checks that an UnsupportedError is thrown as Float64x2List is
/// fixed-length.
/// @author ngl@unipro.ru


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

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

check(List<Float64x2> list) {
  var l = new Float64x2List.fromList(list);
  var len = l.length;
  try {
    l.retainWhere((e) => true);
    Expect.fail("UnsupportedError is expected");
  } on UnsupportedError {}
  Expect.equals(len, l.length);
  try {
    l.retainWhere((e) => false);
    Expect.fail("UnsupportedError is expected");
  } on UnsupportedError {}
  Expect.equals(len, l.length);
}

main() {
  check([]);
  check([f64x2(1.0), f64x2(2.0)]);
  check([f64x2(1.0), f64x2(3.0), f64x2(5.0), f64x2(7.0), f64x2(9.0)]);
}