Various test script changes:

tools/test.dart

 #!/usr/bin/env dart_bin
 // Copyright (c) 2011, 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.
 
 #library("test");
 
 #import("testing/dart/test_runner.dart");
 #import("testing/dart/test_options.dart");
 
 #import("../tests/co19/test_config.dart");
 #import("../tests/corelib/test_config.dart");
 #import("../tests/isolate/test_config.dart");
 #import("../tests/language/test_config.dart");
 #import("../tests/standalone/test_config.dart");
 #import("../tests/stub-generator/test_config.dart");
 #import("../runtime/tests/vm/test_config.dart");
+#import("../samples/tests/samples/test_config.dart");
 
 // TODO(ager): This activity tracking is temporary until stdout is
 // closed implicitly when nothing more can happen.
 int pendingActivities = 0;
 
 void activityStarted() {
   ++pendingActivities;
 }
 
 void activityCompleted() {
   --pendingActivities;
 }
 
 void exitIfLastActivity() {
   if (pendingActivities == 1) {
     stdout.write('\n'.charCodes());
     stdout.close();
   }
 }
 
 main() {
-  var start_time = new Date.now();
+  var startTime = new Date.now();
   var optionsParser = new TestOptionsParser();
   var configurations = optionsParser.parse(new Options().arguments);
   if (configurations == null) return;
   activityStarted();
   // Extract global options from first configuration.
   var firstConf = configurations[0];
   var queue = new ProcessQueue(firstConf['tasks'],
                                firstConf['progress'],
-                               start_time,
+                               startTime,
                                exitIfLastActivity);
   for (var conf in configurations) {
     activityStarted();
+    new SamplesTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
+    activityStarted();
     new StandaloneTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new CorelibTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new Co19TestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new LanguageTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new IsolateTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new StubGeneratorTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     if (conf["component"] == "vm") {
       activityStarted();
       new VMTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     }
   }
 }