LibTest/typed_data/Float32List/retainWhere_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.

// @dart = 2.9

/// @assertion void retainWhere(bool test(E element))
/// Removes all objects from this list that fail to satisfy test.
/// An object o satisfies test if test(o) is true.
/// Throws an UnsupportedError if this is a fixed-length list.
/// @description Checks that [UnsupportedError] is thrown since [Float32List] is
/// a fixed-size list.
/// @note undocumented
/// @author msyabro


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

check(List<double> list) {
  var l = new Float32List.fromList(list);
  var length = l.length;
  try {
    l.retainWhere((e) => true );
    Expect.fail("This operation should not be supported");
  } on UnsupportedError {};
  Expect.equals(length, l.length);

  try {
    l.retainWhere((e) => false );
    Expect.fail("This operation should not be supported");
  } on UnsupportedError {};
  Expect.equals(length, l.length);

}

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