blob: 25a87772f8ef236ee6333c2f7ab8670e19791e45 [file] [log] [blame]
// 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.
// Test merging streams.
library dart.test.stream_from_iterable;
import "dart:async";
import 'package:unittest/unittest.dart';
void runTest(period, maxElapsed, pauseDuration) {
Function done = expectAsync(() {});
Stopwatch watch = new Stopwatch()..start();
Stream stream = new Stream.periodic(period, (x) => x);
var subscription;
subscription = stream.take(5).listen((i) {
if (watch.elapsed > maxElapsed) {
// Test failed in this configuration. Try with more time (or give up
// if we reached an unreasonable maxElapsed).
if (maxElapsed > const Duration(seconds: 2)) {
// Give up.
expect(true, false);
} else {
subscription.cancel();
// Call 'done' ourself, since it won't be invoked in the onDone handler.
runTest(period * 2, maxElapsed * 2, pauseDuration * 2);
done();
return;
}
}
watch.reset();
if (i == 2) {
subscription.pause();
watch.stop();
new Timer(pauseDuration, () {
watch.start();
subscription.resume();
});
}
}, onDone: done);
}
main() {
test("stream-periodic4", () {
runTest(const Duration(milliseconds: 2), const Duration(milliseconds: 8),
const Duration(milliseconds: 10));
});
}