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

lib/src/executable.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.
 
 // TODO(nweiz): This is under lib so that it can be used by the unittest dummy
 // package. Once that package is no longer being updated, move this back into
 // bin.
 library test.executable;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math' as math;
 
 import 'package:args/args.dart';
 import 'package:stack_trace/stack_trace.dart';
 import 'package:yaml/yaml.dart';
 
 import 'backend/test_platform.dart';
 import 'runner/reporter/compact.dart';
+import 'runner/reporter/expanded.dart';
 import 'runner/application_exception.dart';
 import 'runner/load_exception.dart';
 import 'runner/load_exception_suite.dart';
 import 'runner/loader.dart';
 import 'util/exit_codes.dart' as exit_codes;
 import 'util/io.dart';
 import 'utils.dart';
 
 /// The argument parser used to parse the executable arguments.
 final _parser = new ArgParser(allowTrailingOptions: true);
@@ skipping 68 matching lines @@
       allowMultiple: true);
   _parser.addOption("concurrency",
       abbr: 'j',
       help: 'The number of concurrent test suites run.\n'
           '(defaults to $_defaultConcurrency)',
       valueHelp: 'threads');
   _parser.addOption("pub-serve",
       help: 'The port of a pub serve instance serving "test/".',
       hide: !supportsPubServe,
       valueHelp: 'port');
+  _parser.addOption("reporter",
+      abbr: 'r',
+      help: 'The runner used to print test results.',
+      allowed: ['compact', 'expanded'],
+      defaultsTo: Platform.isWindows ? 'expanded' : 'compact',
+      allowedHelp: {
+    'compact': 'A single line, updated continuously.',
+    'expanded': 'A separate line for each update.'
+  });
   _parser.addFlag("color", defaultsTo: null,
       help: 'Whether to use terminal colors.\n(auto-detected by default)');
 
   var options;
   try {
     options = _parser.parse(args);
   } on FormatException catch (error) {
     _printUsage(error.message);
     exitCode = exit_codes.usage;
     return;
@@ skipping 112 matching lines @@
         if (pattern is RegExp) {
           stderr.writeln('regular expression "${pattern.pattern}".');
         } else {
           stderr.writeln('"$pattern".');
         }
         exitCode = exit_codes.data;
         return null;
       }
     }
 
-    var reporter = new CompactReporter(flatten(suites),
-        concurrency: concurrency, color: color);
+    var reporter = options["reporter"] == "compact"
+        ? new CompactReporter(flatten(suites),
+            concurrency: concurrency, color: color)
+        : new ExpandedReporter(flatten(suites),
+            concurrency: concurrency, color: color);
 
     // Override the signal handler to close [reporter]. [loader] will still be
     // closed in the [whenComplete] below.
     signalSubscription.onData((_) {
       signalSubscription.cancel();
       closed = true;
 
       // Wait a bit to print this message, since printing it eagerly looks weird
       // if the tests then finish immediately.
       var timer = new Timer(new Duration(seconds: 1), () {
@@ skipping 107 matching lines @@
       if (description is! Map) return false;
       var path = description["path"];
       if (path is! String) return false;
 
       print("$version (from $path)");
       return true;
 
     default: return false;
   }
 }