Add a --reporter flag and expose the expanded reporter.

lib/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.
 
 library test;
 
 import 'dart:async';
 
 import 'package:path/path.dart' as p;
 
 import 'src/backend/declarer.dart';
 import 'src/backend/invoker.dart';
 import 'src/backend/suite.dart';
 import 'src/backend/test_platform.dart';
 import 'src/frontend/timeout.dart';
-import 'src/runner/reporter/no_io_compact.dart';
+import 'src/runner/reporter/expanded.dart';
 import 'src/utils.dart';
 
 export 'package:matcher/matcher.dart';
 
 export 'src/frontend/expect.dart';
 export 'src/frontend/expect_async.dart';
 export 'src/frontend/future_matchers.dart';
 export 'src/frontend/on_platform.dart';
 export 'src/frontend/prints_matcher.dart';
 export 'src/frontend/skip.dart';
@@ skipping 22 matching lines @@
   // [_globalDeclarer], and schedule a microtask to run the tests once they're
   // finished being defined.
   _globalDeclarer = new Declarer();
   scheduleMicrotask(() {
     var suite =
         new Suite(_globalDeclarer.tests,
               path: p.prettyUri(Uri.base),
               platform: "VM")
         .forPlatform(TestPlatform.vm, os: currentOSGuess);
 
-    new NoIoCompactReporter([suite], color: true).run().then((success) {
+    new ExpandedReporter([suite], color: true).run().then((success) {
       // TODO(nweiz): Set the exit code on the VM when issue 6943 is fixed.
       if (success) return;
       print('');
       new Future.error("Dummy exception to set exit code.");
     });
   });
   return _globalDeclarer;
 }
 
 // TODO(nweiz): This and other top-level functions should throw exceptions if
@@ skipping 104 matching lines @@
 
 /// Handle an error that occurs outside of any test.
 void handleExternalError(error, String message, [stackTrace]) {
   // TODO(nweiz): handle this better.
   registerException(error, stackTrace);
 }
 
 /// Registers an exception that was caught for the current test.
 void registerException(error, [StackTrace stackTrace]) =>
     Invoker.current.handleError(error, stackTrace);