Fix include order PRESUBMIT check: #if-#elif-#else

PRESUBMIT_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 os
 import re
 import unittest
 
 import PRESUBMIT
@@ skipping 137 matching lines @@
   def testConflictAdded2(self):
     scope = [(1, '#include "c.h"'),
              (2, '#include "b.h"'),
              (3, '#include "d.h"')]
     mock_input_api = MockInputApi()
     warnings = PRESUBMIT._CheckIncludeOrderForScope(scope, mock_input_api,
                                                     '', [2])
     self.assertEqual(1, len(warnings))
     self.assertTrue('2' in warnings[0])
 
+  def testIfElifElseEndif(self):
+    mock_input_api = MockInputApi()
+    contents = ['#include "e.h"',
+                '#if foo',
+                '#include "d.h"',
+                '#elif bar',
+                '#include "c.h"',
+                '#else',
+                '#include "b.h"',
+                '#endif',
+                '#include "a.h"']
+    mock_file = MockFile('', contents)
+    warnings = PRESUBMIT._CheckIncludeOrderInFile(
+        mock_input_api, mock_file, True, range(1, len(contents) + 1))
+    self.assertEqual(0, len(warnings))
+
 
 if __name__ == '__main__':
   unittest.main()