Add flag to disable capturing stack traces.

pkg/scheduled_test/lib/scheduled_test.dart

 // 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.
 
 // TODO(nweiz): Add support for calling [schedule] while the schedule is already
 // running.
 // TODO(nweiz): Port the non-Pub-specific scheduled test libraries from Pub.
 /// A package for writing readable tests of asynchronous behavior.
 ///
 /// This package works by building up a queue of asynchronous tasks called a
@@ skipping 183 matching lines @@
 /// inspect the state of the schedule.
 ///
 /// This is `null` when there's no test currently running.
 Schedule get currentSchedule => _currentSchedule;
 Schedule _currentSchedule;
 
 /// The user-provided setUp function. This is set for each test during
 /// `unittest.setUp`.
 Function _setUpFn;
 
+/// If `true`, then new [Task]s will capture the current stack trace before
+/// running. This can be set to `false` to speed up running tests since
+/// capturing stack traces is currently quite slow. Even when set to `false`,
+/// stack traces from *thrown* exceptions will be caught. This only disables
+/// the eager collection of stack traces *before* an error occurs. Defaults to
+/// `true`.
+bool captureStackTraces = true;

[nweiz, 2013/04/09 21:25:58]

I'd rather see this on the Schedule class. That's where other scheduled test
configuration has gone.

[Bob Nystrom, 2013/04/10 21:52:00]

Done.

+
 /// Creates a new test case with the given description and body. This has the
 /// same semantics as [unittest.test].
 void test(String description, void body()) =>
   _test(description, body, unittest.test);
 
 /// Creates a new test case with the given description and body that will be the
 /// only test run in this file. This has the same semantics as
 /// [unittest.solo_test].
 void solo_test(String description, void body()) =>
   _test(description, body, unittest.solo_test);
@@ skipping 130 matching lines @@
 
   return currentSchedule.wrapFuture(future, description);
 }
 
 // TODO(nweiz): re-export these once issue 9535 is fixed.
 unittest.Configuration get unittestConfiguration =>
   unittest.unittestConfiguration;
 void set unittestConfiguration(unittest.Configuration value) {
   unittest.unittestConfiguration = value;
 }