Sigmund Cherem
fb29d0e96d
This allows to break a circular dependency between package:expect and package:async_helper, which will simplify the support for modular tests using package:modular_test. Change-Id: Ie48723d3f35d51a8fbe622e0158450e8104fe3f5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/102140 Reviewed-by: Johnni Winther <johnniwinther@google.com>
51 lines
1.5 KiB
Dart
51 lines
1.5 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test merging streams.
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library dart.test.stream_from_iterable;
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import 'dart:async';
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import 'package:async_helper/async_minitest.dart';
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void runTest(period, maxElapsed, pauseDuration) {
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Function done = expectAsync(() {});
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Stopwatch watch = new Stopwatch()..start();
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Stream stream = new Stream.periodic(period, (x) => x);
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var subscription;
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subscription = stream.take(5).listen((i) {
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if (watch.elapsed > maxElapsed) {
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// Test failed in this configuration. Try with more time (or give up
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// if we reached an unreasonable maxElapsed).
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if (maxElapsed > const Duration(seconds: 2)) {
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// Give up.
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expect(true, false);
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} else {
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subscription.cancel();
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// Call 'done' ourself, since it won't be invoked in the onDone handler.
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runTest(period * 2, maxElapsed * 2, pauseDuration * 2);
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done();
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return;
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}
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}
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watch.reset();
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if (i == 2) {
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subscription.pause();
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watch.stop();
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new Timer(pauseDuration, () {
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watch.start();
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subscription.resume();
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});
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}
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}, onDone: done);
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}
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main() {
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test("stream-periodic4", () {
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runTest(const Duration(milliseconds: 2), const Duration(milliseconds: 8),
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const Duration(milliseconds: 10));
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});
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}
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