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

lib/src/runner/reporter/compact.dart

 // Copyright (c) 2015, 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.runner.reporter.compact;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
 
@@ skipping 68 matching lines @@
   int _lastProgressFailed;
 
   /// The message printed for the last progress notification.
   String _lastProgressMessage;
 
   // Whether a newline has been printed since the last progress line.
   var _printedNewline = true;
 
   /// Creates a [ConsoleReporter] that will run all tests in [suites].
   ///
-  /// If [color] is `true`, this will use terminal colors; if it's `false`, it
-  /// won't.
+  /// [concurrency] controls how many suites are run at once. If [color] is
+  /// `true`, this will use terminal colors; if it's `false`, it won't.
   CompactReporter(Iterable<Suite> suites, {int concurrency, bool color: true})
       : _multiplePaths = suites.map((suite) => suite.path).toSet().length > 1,
         _multiplePlatforms =
             suites.map((suite) => suite.platform).toSet().length > 1,
         _engine = new Engine(suites, concurrency: concurrency),
         _color = color,
         _green = color ? '\u001b[32m' : '',
         _red = color ? '\u001b[31m' : '',
         _yellow = color ? '\u001b[33m' : '',
         _noColor = color ? '\u001b[0m' : '' {
@@ skipping 191 matching lines @@
       name = "${liveTest.suite.path}: $name";
     }
 
     if (_multiplePlatforms && liveTest.suite.platform != null) {
       name = "[${liveTest.suite.platform}] $name";
     }
 
     return name;
   }
 }