LibTest/typed_data/Float32List/singleWhere_A02_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 E singleWhere(bool test(E element))
 * ...
 * Checks all elements to see if test(element) returns true. If exactly one
 * element satisfies test, that element is returned. Otherwise, if there are
 * no matching elements, or if there is more than one matching element, a
 * StateError is thrown.
 * @description Checks that a [StateError] is thrown if no element matches
 * [test].
 * @author msyabro
 */

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

main() {
  var l = new Float32List.fromList([]);
  Expect.throws(() { l.singleWhere((e) => true); }, (e) => e is StateError);

  l = new Float32List.fromList([1.0, 2.0, 3.0, 4.0, 5.0]);
  Expect.throws(() { l.singleWhere((e) => e == 0); }, (e) => e is StateError);

  l = new Float32List.fromList([1.0, 2.0, 3.0, 4.0, 5.0]);
  Expect.throws(() { l.singleWhere((e) => false); }, (e) => e is StateError);
}