Rename test.dart component to specify compiler + runtime.

tools/test.dart

 #!/usr/bin/env dart
 // Copyright (c) 2012, 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.
 
 /**
  * This file is the entrypoint of the dart test suite.  This suite is used
  * to test:
  *
  *     1. the dart vm
@@ skipping 34 matching lines @@
 #import("../frog/tests/native/test_config.dart");
 #import("../frog/tests/await/test_config.dart");
 #import("../utils/tests/css/test_config.dart");
 #import("../utils/tests/import_mapper/test_config.dart");
 #import("../utils/tests/peg/test_config.dart");
 
 main() {
   var startTime = new Date.now();
   var optionsParser = new TestOptionsParser();
   List<Map> configurations = optionsParser.parse(new Options().arguments);
-  if (configurations == null) return;
+  if (configurations == null || configurations.length == 0) return;
 
   // Extract global options from first configuration.
   var firstConf = configurations[0];
   Map<String, RegExp> selectors = firstConf['selectors'];
   var maxProcesses = firstConf['tasks'];
   var progressIndicator = firstConf['progress'];
   var verbose = firstConf['verbose'];
   var printTiming = firstConf['time'];
   var listTests = firstConf['list'];
   var keepGeneratedTests = firstConf['keep-generated-tests'];
 
   // Print the configurations being run by this execution of
   // test.dart. However, don't do it if the silent progress indicator
   // is used. This is only needed because of the junit tests.
   if (progressIndicator != 'silent') {
     StringBuffer sb = new StringBuffer('Test configuration');
     sb.add(configurations.length > 1 ? 's:' : ':');
     for (Map conf in configurations) {
-      sb.add(' ${conf["component"]}_${conf["mode"]}_${conf["arch"]}');
+      sb.add(' ${conf["compiler"]}_${conf["runtime"]}_${conf["mode"]}_' + 
+          '${conf["arch"]}');
       if (conf['checked']) sb.add('_checked');
     }
     print(sb);
   }
 
   var configurationIterator = configurations.iterator();
   bool enqueueConfiguration(ProcessQueue queue) {
     if (!configurationIterator.hasNext()) {
       return false;
     }
@@ skipping 64 matching lines @@
   // Start process queue.
   var queue = new ProcessQueue(maxProcesses,
                                progressIndicator,
                                startTime,
                                printTiming,
                                enqueueConfiguration,
                                verbose,
                                listTests,
                                keepGeneratedTests);
 }