blob: f6a3a93bd91199ce979910715ae8ec880ab03261 [file] [log] [blame]
/*
* 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.
*/
/**
* @assertion final Future<T> first
* If this stream is empty (a done event occurs before the first data event),
* the resulting future completes with a StateError.
* Except for the type of the error, this method is equivalent to
* this.elementAt(0).
* @description Checks that for non-empty stream, this.first is equivalent to this.elementAt(0).
* @author kaigorodov
*/
import "dart:async";
import "../../../Utils/async_utils.dart";
import "../../../Utils/expect.dart";
import "IsolateStream.dart" as IsolateStream;
const VAL=123;
void check(Stream s) {
asyncStart();
s.elementAt(0).then((value){
Expect.equals(VAL, value);
asyncEnd();
});
}
main() {
check(IsolateStream.fromIterable([VAL,2,3]));
check(IsolateStream.fromIterable(new Iterable.generate(1, (int index)=>VAL)));
}