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

chrome/common/extensions/docs/server2/test_file_system_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.
 
 from copy import deepcopy
 from file_system import FileNotFoundError, StatInfo
 from test_file_system import TestFileSystem, MoveTo
 import unittest
 
@@ skipping 83 matching lines @@
                      sorted(fs.ReadSingle('/apps/').Get()))
     self.assertEqual(['a11y.html', 'about_apps.html', 'fakedir/'],
                      sorted(fs.ReadSingle('apps/').Get()))
     self.assertEqual(['file.html'], fs.ReadSingle('/apps/fakedir/').Get())
     self.assertEqual(['file.html'], fs.ReadSingle('apps/fakedir/').Get())
 
   def testStat(self):
     fs = TestFileSystem(deepcopy(_TEST_DATA))
     self.assertRaises(FileNotFoundError, fs.Stat, 'foo')
     self.assertRaises(FileNotFoundError, fs.Stat, '404.html/')
+    self.assertEquals(StatInfo('0', child_versions={
+                        '404.html': '0',
+                        'apps/': '0',
+                        'extensions/': '0',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('0'), fs.Stat('404.html'))
     self.assertEquals(StatInfo('0', child_versions={
                         'activeTab.html': '0',
                         'alarms.html': '0',
                       }), fs.Stat('extensions/'))
 
     fs.IncrementStat()
+    self.assertEquals(StatInfo('1', child_versions={
+                        '404.html': '1',
+                        'apps/': '1',
+                        'extensions/': '1',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('1'), fs.Stat('404.html'))
     self.assertEquals(StatInfo('1', child_versions={
                         'activeTab.html': '1',
                         'alarms.html': '1',
                       }), fs.Stat('extensions/'))
 
     fs.IncrementStat(path='404.html')
+    self.assertEquals(StatInfo('2', child_versions={
+                        '404.html': '2',
+                        'apps/': '1',
+                        'extensions/': '1',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('2'), fs.Stat('404.html'))
     self.assertEquals(StatInfo('1', child_versions={
                         'activeTab.html': '1',
                         'alarms.html': '1',
                       }), fs.Stat('extensions/'))
 
     fs.IncrementStat()
+    self.assertEquals(StatInfo('3', child_versions={
+                        '404.html': '3',
+                        'apps/': '2',
+                        'extensions/': '2',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('3'), fs.Stat('404.html'))
     self.assertEquals(StatInfo('2', child_versions={
                         'activeTab.html': '2',
                         'alarms.html': '2',
                       }), fs.Stat('extensions/'))
 
-    fs.IncrementStat(path='extensions/')
+    # It doesn't make sense to increment the version of directories. Directory
+    # versions are derived from the version of files within them.
+    self.assertRaises(ValueError, fs.IncrementStat, path='')
+    self.assertRaises(ValueError, fs.IncrementStat, path='extensions/')
+    self.assertEquals(StatInfo('3', child_versions={
+                        '404.html': '3',
+                        'apps/': '2',
+                        'extensions/': '2',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('3'), fs.Stat('404.html'))
-    self.assertEquals(StatInfo('3', child_versions={
+    self.assertEquals(StatInfo('2', child_versions={
                         'activeTab.html': '2',
                         'alarms.html': '2',
                       }), fs.Stat('extensions/'))
 
     fs.IncrementStat(path='extensions/alarms.html')
+    self.assertEquals(StatInfo('3', child_versions={
+                        '404.html': '3',
+                        'apps/': '2',
+                        'extensions/': '3',
+                      }), fs.Stat(''))
     self.assertEquals(StatInfo('3'), fs.Stat('404.html'))
     self.assertEquals(StatInfo('3', child_versions={
                         'activeTab.html': '2',
                         'alarms.html': '3',
                       }), fs.Stat('extensions/'))
 
+    fs.IncrementStat(path='extensions/activeTab.html', by=3)
+    self.assertEquals(StatInfo('5', child_versions={
+                        '404.html': '3',
+                        'apps/': '2',
+                        'extensions/': '5',
+                      }), fs.Stat(''))
+    self.assertEquals(StatInfo('3'), fs.Stat('404.html'))
+    self.assertEquals(StatInfo('5', child_versions={
+                        'activeTab.html': '5',
+                        'alarms.html': '3',
+                      }), fs.Stat('extensions/'))
+
   def testMoveTo(self):
     self.assertEqual({'foo': {'a': 'b', 'c': 'd'}},
                      MoveTo('foo', {'a': 'b', 'c': 'd'}))
     self.assertEqual({'foo': {'bar': {'a': 'b', 'c': 'd'}}},
                      MoveTo('foo/bar', {'a': 'b', 'c': 'd'}))
     self.assertEqual({'foo': {'bar': {'baz': {'a': 'b'}}}},
                      MoveTo('foo/bar/baz', {'a': 'b'}))
 
 
 if __name__ == '__main__':
   unittest.main()