LibTest/async/Stream/length_A01_t01.test.dart

// Copyright (c) 2011, 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 Future<int> length
///    The number of elements in this stream.
///    Waits for all elements of this stream. When the stream ends, the returned
/// future is completed with the number of elements.
/// @description Checks that correct number of elements is returned.
/// @author kaigorodov

library length_A01_t01;
import "../../../Utils/expect.dart";

void test(CreateStreamFunction create) {
  AsyncExpect.value(0, create([]).length);
  AsyncExpect.value(4, create([1, 2, 3, null]).length);
  AsyncExpect.value(0, create(new Iterable.generate(0, (int i) => i * 2)).length);
  AsyncExpect.value(10, create(new Iterable.generate(10, (int i) => i * 2)).length);
}