LibTest/async/Stream/elementAt_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<T> elementAt(int index)
///    Returns the value of the indexth data event of this stream.
///    Stops listening to the stream after the indexth data event has been received.
/// @description Checks that the future returns the value of the indexth data
/// event of this stream.
/// @author kaigorodov

library elementAt_A01_t01;
import "dart:async";
import "../../../Utils/expect.dart";

void test(CreateStreamFunction create) {
  AsyncExpect.value(123, create([123]).elementAt(0));
  AsyncExpect.value(123, create([1,123,2,3]).elementAt(1));
  for (int k = 0; k < 10; k++) {
    Stream<int> s = create(new Iterable<int>.generate(10, (int index) => index));
    AsyncExpect.value(k, s.elementAt(k));
  }
}