[NaCl SDK] Convert python scripts from optparse to argparse.

native_client_sdk/src/build_tools/tests/easy_template_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import cStringIO
 import difflib
 import os
 import sys
 import unittest
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+TOOLS_DIR = os.path.dirname(SCRIPT_DIR)
+CHROME_SRC = os.path.dirname(os.path.dirname(os.path.dirname(TOOLS_DIR)))
+MOCK_DIR = os.path.join(CHROME_SRC, 'third_party', 'pymock')
 BUILD_TOOLS_DIR = os.path.dirname(SCRIPT_DIR)
 
 sys.path.append(BUILD_TOOLS_DIR)
+sys.path.append(MOCK_DIR)
+
 import easy_template
+import mock
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 
 class EasyTemplateTestCase(unittest.TestCase):
   def _RunTest(self, template, expected, template_dict):
     src = cStringIO.StringIO(template)
     dst = cStringIO.StringIO()
     easy_template.RunTemplate(src, dst, template_dict)
     if dst.getvalue() != expected:
       expected_lines = expected.splitlines(1)
       actual_lines = dst.getvalue().splitlines(1)
       diff = ''.join(difflib.unified_diff(
@@ skipping 82 matching lines @@
         {'name': 'name', 'type': 'std::string'},
         {'name': 'problems', 'type': 'array', 'basetype': 'int', 'size': 99}]})
 
   def testModulo(self):
     self._RunTest('No expression %', 'No expression %', {})
     self._RunTest('% before {{3 + 4}}', '% before 7', {})
     self._RunTest('{{2**8}} % after', '256 % after', {})
     self._RunTest('inside {{8 % 3}}', 'inside 2', {})
     self._RunTest('Everywhere % {{8 % 3}} %', 'Everywhere % 2 %', {})
 
+  @mock.patch('easy_template.TemplateToPython')
+  @mock.patch('sys.stdout', mock.Mock())
+  def testMainArgParsing(self, mock_template_to_python):
+    easy_template.main([__file__])
+    mock_template_to_python.assert_called()
+
 
 if __name__ == '__main__':
   unittest.main()