Update the test runner to use the new dart:io API

tools/test.dart

Index: tools/test.dart
diff --git a/tools/test.dart b/tools/test.dart
index dbd5ba87a4d359869b1e07900269ab0798fa45d5..6b1cb591d8ab9e3da9b066ad1d8dcd170c50aba8 100755
--- a/tools/test.dart
+++ b/tools/test.dart
@@ -1,5 +1,5 @@
 #!/usr/bin/env dart
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -71,7 +71,7 @@ final TEST_SUITE_DIRECTORIES = [
 ];
 
 main() {
-  var startTime = new Date.now();
+  var startTime = new DateTime.now();
   var optionsParser = new TestOptionsParser();
   List<Map> configurations = optionsParser.parse(new Options().arguments);
   if (configurations == null || configurations.length == 0) return;
@@ -105,7 +105,7 @@ main() {
         ['Test configurations:'] : ['Test configuration:'];
     for (Map conf in configurations) {
       List settings = ['compiler', 'runtime', 'mode', 'arch']
-          .mappedBy((name) => conf[name]).toList();
+          .map((name) => conf[name]).toList();
       if (conf['checked']) settings.add('checked');
       output_words.add(settings.join('_'));
     }
@@ -116,6 +116,7 @@ main() {
     return TestUtils.isBrowserRuntime(config['runtime']);
   });
 
+  List<TestingServers> servers = [];

[kustermann, 2013/03/13 13:37:56]

Why not make it a "List<Future> serverFutures", start them here (as we did
before) and do "Future.wait(serverFutures).then((_) => startProcessQueue)" at
the bottom of the file instead of the recursive call of "startTesting".

[Søren Gjesse, 2013/03/13 15:17:18]

Done.

   var testSuites = new List<TestSuite>();
   var maxBrowserProcesses = maxProcesses;
   for (var conf in configurations) {
@@ -124,10 +125,9 @@ main() {
       // The http server is available on window.location.port, and a second
       // server for cross-domain tests can be found by calling
       // getCrossOriginPortNumber().
-      var servers = new TestingServers(new Path(TestUtils.buildDir(conf)),
-                                       useContentSecurityPolicy);
-      servers.startServers('127.0.0.1');
-      conf['_servers_'] = servers;
+      servers.add(new TestingServers(new Path(TestUtils.buildDir(conf)),
+                                     useContentSecurityPolicy));
+      conf['_servers_'] = servers.last;
     }
 
     // There should not be more than one InternetExplorerDriver instance
@@ -203,13 +203,29 @@ main() {
   }
   eventListener.add(new ExitCodeSetter());
 
-  // Start process queue.
-  new ProcessQueue(maxProcesses,
-                   maxBrowserProcesses,
-                   startTime,
-                   testSuites,
-                   eventListener,
-                   allTestsFinished,
-                   verbose,
-                   listTests);
+  void startProcessQueue() {
+    // Start process queue.
+    new ProcessQueue(maxProcesses,
+                     maxBrowserProcesses,
+                     startTime,
+                     testSuites,
+                     eventListener,
+                     allTestsFinished,
+                     verbose,
+                     listTests);
+  }
+
+  void startTesting(List<TestingServers> servers) {
+    // Start all the HTTP servers required before starting the process queue.
+    if (servers.isEmpty) {
+      startProcessQueue();
+    } else {
+      TestingServers server = servers.removeLast();
+      server.startServers('127.0.0.1').then((_) {
+        startTesting(servers);
+      });
+    }
+  }
+
+  startTesting(servers);
 }