Add python wrapper for test.dart.

tools/test_wrapper.py

+#!/usr/bin/env python
+
+import os
+import platform
+import string
+import subprocess
+import sys
+
+# Try to guess the host operating system.
+def GuessOS():
+  id = platform.system()
+  if id == "Linux":
+    return "linux"
+  elif id == "Darwin":
+    return "macos"
+  elif id == "Windows" or id == "Microsoft":
+    # On Windows Vista platform.system() can return "Microsoft" with some
+    # versions of Python, see http://bugs.python.org/issue1082 for details.
+    return "windows"
+  else:
+    return None
+
+def Main():
+  args = string.join(sys.argv[1:])

[Bill Hesse, 2012/01/04 15:11:08]

This shouldn't be a problem here, but in test.dart we create commands with
arguments containing spaces, that aren't surrounded by quotes.  Maybe we should
fix that, since it makes it hard to copy and paste commands, and this type of
args manipulation breaks.

+  tools_dir = os.path.dirname(os.path.realpath(__file__))
+  dart_binary = string.join([tools_dir, 'testing', 'bin', GuessOS(), 'dart'],
+                            os.sep)
+  if GuessOS() == "windows":
+    dart_binary = dart_binary + ".exe"
+  dart_test_script = string.join([tools_dir, 'test.dart'], os.sep)
+  command = "%s %s %s" % (dart_binary, dart_test_script, args)
+  return subprocess.call(command, shell=True)
+
+if __name__ == '__main__':
+  sys.exit(Main())