Docserver: Make MockFileSystem not iterate over the entire file system as part

chrome/common/extensions/docs/server2/mock_file_system_test.py

 #!/usr/bin/env python
 # Copyright 2013 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.
 
 from copy import deepcopy
 from file_system import FileNotFoundError, StatInfo
 from mock_file_system import MockFileSystem
 from test_file_system import TestFileSystem
 import unittest
@@ skipping 65 matching lines @@
         *fs.CheckAndReset(read_count=1, read_resolve_count=1, stat_count=2))
     self.assertTrue(*fs.CheckAndReset())
 
   def testUpdates(self):
     fs = MockFileSystem(TestFileSystem(deepcopy(_TEST_DATA)))
 
     self.assertEqual(StatInfo('0', child_versions={
       '404.html': '0',
       'apps/': '0',
       'extensions/': '0'
-    }), fs.Stat('/'))
+    }), fs.Stat(''))
     self.assertEqual(StatInfo('0'), fs.Stat('404.html'))
     self.assertEqual(StatInfo('0', child_versions={
       'a11y.html': '0',
       'about_apps.html': '0',
       'fakedir/': '0',
     }), fs.Stat('apps/'))
     self.assertEqual('404.html contents', fs.ReadSingle('404.html').Get())
 
     fs.Update({
       '404.html': 'New version!'
     })
 
     self.assertEqual(StatInfo('1', child_versions={
       '404.html': '1',
       'apps/': '0',
       'extensions/': '0'
-    }), fs.Stat('/'))
+    }), fs.Stat(''))
     self.assertEqual(StatInfo('1'), fs.Stat('404.html'))
     self.assertEqual(StatInfo('0', child_versions={
       'a11y.html': '0',
       'about_apps.html': '0',
       'fakedir/': '0',
     }), fs.Stat('apps/'))
     self.assertEqual('New version!', fs.ReadSingle('404.html').Get())
 
     fs.Update({
       '404.html': 'Newer version!',
       'apps': {
         'fakedir': {
           'file.html': 'yo'
         }
       }
     })
 
     self.assertEqual(StatInfo('2', child_versions={
       '404.html': '2',
       'apps/': '2',
       'extensions/': '0'
-    }), fs.Stat('/'))
+    }), fs.Stat(''))
     self.assertEqual(StatInfo('2'), fs.Stat('404.html'))
     self.assertEqual(StatInfo('2', child_versions={
       'a11y.html': '0',
       'about_apps.html': '0',
       'fakedir/': '2',
     }), fs.Stat('apps/'))
     self.assertEqual(StatInfo('0'), fs.Stat('apps/a11y.html'))
     self.assertEqual(StatInfo('2', child_versions={
       'file.html': '2'
     }), fs.Stat('apps/fakedir/'))
     self.assertEqual(StatInfo('2'), fs.Stat('apps/fakedir/file.html'))
     self.assertEqual(StatInfo('0', child_versions={
       'activeTab.html': '0',
       'alarms.html': '0'
     }), fs.Stat('extensions/'))
     self.assertEqual('Newer version!', fs.ReadSingle('404.html').Get())
     self.assertEqual('yo', fs.ReadSingle('apps/fakedir/file.html').Get())
 
 if __name__ == '__main__':
   unittest.main()