ahe@google.com
4b89a86b0a
Review URL: https://codereview.chromium.org//19571007 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25297 260f80e4-7a28-3924-810f-c04153c831b5
64 lines
2.1 KiB
Dart
64 lines
2.1 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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/// This library is used for testing asynchronous tests.
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/// If a test is asynchronous, it needs to notify the testing driver
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/// about this (otherwise tests may get reported as passing [after main()
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/// finished] even if the asynchronous operations fail).
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/// Tests which can't use the unittest framework should use the helper functions
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/// in this library.
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/// This library provides two methods
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/// - asyncStart(): Needs to be called before an asynchronous operation is
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/// scheduled.
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/// - asyncEnd(): Needs to be called as soon as the asynchronous operation
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/// ended.
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/// After the last asyncStart() called was matched with a corresponding
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/// asyncEnd() call, the testing driver will be notified that the tests is done.
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library async_helper;
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// TODO(kustermann): This is problematic because we rely on a working
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// 'dart:isolate' (i.e. it is in particular problematic with dart2js).
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// It would be nice if we could use a different mechanism for different
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// runtimes.
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import 'dart:isolate';
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bool _initialized = false;
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ReceivePort _port = null;
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int _asyncLevel = 0;
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Exception _buildException(String msg) {
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return new Exception('Fatal: $msg. This is most likely a bug in your test.');
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}
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void asyncStart() {
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if (_initialized && _asyncLevel == 0) {
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throw _buildException('asyncStart() was called even though we are done '
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'with testing.');
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}
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if (!_initialized) {
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print('unittest-suite-wait-for-done');
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_initialized = true;
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_port = new ReceivePort();
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}
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_asyncLevel++;
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}
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void asyncEnd() {
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if (_asyncLevel <= 0) {
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if (!_initialized) {
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throw _buildException('asyncEnd() was called before asyncStart().');
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} else {
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throw _buildException('asyncEnd() was called more often than '
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'asyncStart().');
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}
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}
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_asyncLevel--;
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if (_asyncLevel == 0) {
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_port.close();
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_port = null;
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print('unittest-suite-success');
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}
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}
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