Print out experimental test.py reproduction command

tools/testing/dart/test_progress.dart

 // 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.
 
 library test_progress;
 
 import "dart:io";
 import "dart:io" as io;
 import "http_server.dart" as http_server;
 import "status_file_parser.dart";
@@ skipping 119 matching lines @@
     var command = test.commands[i];
     var commandOutput = test.commandOutputs[command];
     output.add('');
     output.add('Command[$i]: $command');
     if (commandOutput != null) {
       output.add('Took ${commandOutput.time}');
     } else {
       output.add('Did not run');
     }
   }
+
+  var arguments = ['python', 'tools${Platform.pathSeparator}test.py'];

[ricow1, 2013/06/20 13:54:50]

just write /
python understands that, even on strange operating systems

[kustermann, 2013/06/20 14:17:24]

"even on strange operating system": I like it :-)

+  arguments.addAll(test.configuration['_reproducing_arguments_']);
+  arguments.add(test.displayName);
+  var testPyCommandline = arguments.map(escapeCommandLineArgument).join(' ');
+
+  output.add('');
+  output.add('Short reproduction command (experimental):');
+  output.add("    $testPyCommandline");
   return output;
 }
 
 String _buildSummaryEnd(int failedTests) {
     if (failedTests == 0) {
       return '\n===\n=== All tests succeeded\n===\n';
     } else {
       var pluralSuffix = failedTests != 1 ? 's' : '';
       return '\n===\n=== ${failedTests} test$pluralSuffix failed\n===\n';
     }
@@ skipping 376 matching lines @@
         print('@@@BUILD_STEP $stepName failures@@@');
       }
       for (String line in _failureSummary) {
         print(line);
       }
       print('');
     }
     print(_buildSummaryEnd(_failedTests));
   }
 }