Better progress reporting.

sdk/lib/_internal/pub/test/serve/utils.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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 pub_tests;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 132 matching lines @@
       _webSocket.close();
       _webSocket = null;
       _webSocketBroadcastStream = null;
     }
   });
 
   if (shouldGetFirst) {
     _pubServer.stdout.expect(consumeThrough("Got dependencies!"));
   }
 
+  _pubServer.stdout.expect(startsWith("Loading source assets..."));
+  _pubServer.stdout.expect(consumeWhile(matches("Loading .* transformers...")));
+
   // The server should emit one or more ports.
   _pubServer.stdout.expect(
       consumeWhile(predicate(_parsePort, 'emits server url')));
   schedule(() {
     expect(_ports, isNot(isEmpty));
     _portsCompleter.complete();
   });
 
   return _pubServer;
 }
@@ skipping 164 matching lines @@
 /// included. Unlike [getServerUrl], this should only be called after the ports
 /// are known.
 String _getServerUrlSync([String root, String path]) {
   if (root == null) root = 'web';
   expect(_ports, contains(root));
   var url = "http://127.0.0.1:${_ports[root]}";
   if (path != null) url = "$url/$path";
   return url;
 }