By popular demand, print the configurations being tested by test.dart at startup.

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 46 matching lines @@
   // 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"]}');
+      if (conf['checked']) sb.add('_checked');
+    }
+    print(sb);
+  }
+
   var configurationIterator = configurations.iterator();
   bool enqueueConfiguration(ProcessQueue queue) {
     if (!configurationIterator.hasNext()) {
       return false;
     }
 
     var conf = configurationIterator.next();
     if (selectors.containsKey('samples')) {
       queue.addTestSuite(new SamplesTestSuite(conf));
     }
@@ skipping 59 matching lines @@
   // Start process queue.
   var queue = new ProcessQueue(maxProcesses,
                                progressIndicator,
                                startTime,
                                printTiming,
                                enqueueConfiguration,
                                verbose,
                                listTests,
                                keepGeneratedTests);
 }