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.
 */
/**
 * @assertion void retainWhere(bool test(E element))
 * Removes all elements of this list that fail to satisfy test.
 * Throws an UnsupportedError, if the length of [this] cannot be changed.
 * @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) {
  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 catch(ok) {};
  Expect.equals(length, l.length);

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

}

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