Add short read/write testing of Socket and Process tests

tools/utils.py

 # 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.
 
 # This file contains a set of utilities functions used by other Python-based
 # scripts.
 
 import commands
 import os
 import platform
@@ skipping 155 matching lines @@
 
 
 def ParseTestOptionsMultiple(pattern, source, workspace):
   matches = pattern.findall(source)
   if matches:
     result = []
     for match in matches:
       if len(match) > 0:
         result.append(
             [RewritePathSeparator(o, workspace) for o in match.split(' ')]);
+      else:
+        result.append([])
     return result
   else:
     return None
 
 
 def ConfigureJava():
   java_home = '/usr/libexec/java_home'
   if os.path.exists(java_home):
     proc = subprocess.Popen([java_home, '-v', '1.6+'],
                             stdout=subprocess.PIPE,
@@ skipping 55 matching lines @@
   def __init__(self, value):
     self.value = value
 
   def __str__(self):
     return repr(self.value)
 
 
 if __name__ == "__main__":
   import sys
   Main(sys.argv)