Docserver: Add support for viewing docs with a codereview patch applied

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

Index: chrome/common/extensions/docs/server2/patched_file_system_test.py
diff --git a/chrome/common/extensions/docs/server2/patched_file_system_test.py b/chrome/common/extensions/docs/server2/patched_file_system_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..2a93bff7f6c9e8a2155d0f7fa20e707c0310d928
--- /dev/null
+++ b/chrome/common/extensions/docs/server2/patched_file_system_test.py
@@ -0,0 +1,199 @@
+#!/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
+import unittest
+
+from file_system import FileSystem, FileNotFoundError, StatInfo
+from future import Future
+from patched_file_system import PatchedFileSystem
+from patcher import Patcher
+from test_file_system import TestFileSystem
+from test_patcher import TestPatcher
+import url_constants
+
+_TEST_FS_DATA = {
+  'dir1': {
+    'file1.html': 'This is dir1/file1.html',
+    'unmodified': {
+      '1': '1',
+      '2': '',
+    },
+  },
+  'dir2': {
+    'subdir1': {
+      'sub1.txt': 'in subdir(1)',
+      'sub2.txt': 'in subdir(2)',
+      'sub3.txt': 'in subdir(3)',
+    },
+  },
+  'dir3': {
+  },
+  'dir4': {
+    'one.txt': '',
+  },
+  'dir5': {
+    'subdir': {
+      '1.txt': '555',
+    },
+  },
+  'test1.txt': 'test1',
+  'test2.txt': 'test2',
+}
+
+_TEST_PATCH_VERSION = '1001'
+_TEST_PATCH_FILES = (
+  # Added
+  [
+    'test3.txt',
+    'dir1/file2.html',
+    'dir1/newsubdir/a.js',
+    'newdir/1.html',
+  ],
+  # Deleted
+  [
+    'test2.txt',
+    'dir2/subdir1/sub1.txt',
+    'dir4/one.txt',
+    'dir5/subdir/1.txt',
+  ],
+  # Modified
+  [
+    'dir2/subdir1/sub2.txt',
+  ]
+)
+_TEST_PATCH_DATA = {
+  'test3.txt': 'test3 is added.',
+  'dir1/file2.html': 'This is dir1/file2.html',
+  'dir1/newsubdir/a.js': 'This is a.js',
+  'newdir/1.html': 'This comes from a new dir.',
+  'dir2/subdir1/sub2.txt': 'in subdir',
+}
+
+class PatchedFileSystemTest(unittest.TestCase):
+  def setUp(self):
+    self._patcher = TestPatcher(_TEST_PATCH_VERSION,
+                                _TEST_PATCH_FILES,
+                                _TEST_PATCH_DATA)
+    self._host_file_system = TestFileSystem(_TEST_FS_DATA)
+    self._file_system = PatchedFileSystem(self._host_file_system,
+                                          self._patcher)
+
+  def testRead(self):
+    expected = deepcopy(_TEST_PATCH_DATA)
+    # Files that are not modified.
+    expected.update({
+      'dir2/subdir1/sub3.txt': 'in subdir(3)',
+      'dir1/file1.html': 'This is dir1/file1.html',
+    })
+
+    for key in expected:
+      self.assertEqual(expected[key], self._file_system.ReadSingle(key))
+
+    self.assertEqual(
+        expected,
+        self._file_system.Read(expected.keys()).Get())
+
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'test2.txt')
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'dir2/subdir1/sub1.txt')
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'not_existing')
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'dir1/not_existing')
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'dir1/newsubdir/not_existing')
+
+  def testReadDir(self):
+    self.assertEqual(sorted(self._file_system.ReadSingle('dir1/')),
+                     sorted(set(self._host_file_system.ReadSingle('dir1/')) |
+                            {'file2.html', 'newsubdir/'}))
+
+    self.assertEqual(sorted(self._file_system.ReadSingle('dir1/newsubdir/')),
+                     sorted(['a.js']))
+
+    self.assertEqual(sorted(self._file_system.ReadSingle('dir2/')),
+                     sorted(self._host_file_system.ReadSingle('dir2/')))
+
+    self.assertEqual(sorted(self._file_system.ReadSingle('dir2/subdir1/')),
+        sorted(set(self._host_file_system.ReadSingle('dir2/subdir1/')) -
+               {'sub1.txt'}))
+
+    self.assertEqual(sorted(self._file_system.ReadSingle('newdir/')),
+                     sorted(['1.html']))
+
+    self.assertEqual(self._file_system.ReadSingle('dir3/'), [])
+
+    self.assertEqual(self._file_system.ReadSingle('dir4/'), [])
+
+    self.assertRaises(FileNotFoundError, self._file_system.ReadSingle,
+      'not_existing_dir/')
+
+  def testStat(self):
+    version = 'patched_%s' % self._patcher.GetVersion()
+    old_version = self._host_file_system.Stat('dir1/file1.html').version
+
+    # Stat an unmodified file.
+    self.assertEqual(self._file_system.Stat('dir1/file1.html'),
+                     self._host_file_system.Stat('dir1/file1.html'))
+
+    # Stat an unmodified directory.
+    self.assertEqual(self._file_system.Stat('dir1/unmodified/'),
+                     self._host_file_system.Stat('dir1/unmodified/'))
+
+    # Stat a modified directory.
+    self.assertEqual(self._file_system.Stat('dir2/'),
+                     StatInfo(version, {'subdir1/': version}))
+    self.assertEqual(self._file_system.Stat('dir2/subdir1/'),
+                     StatInfo(version, {'sub2.txt': version,
+                                        'sub3.txt': old_version}))
+
+    # Stat a modified directory with new files.
+    expected = self._host_file_system.Stat('dir1/')
+    expected.version = version
+    expected.child_versions.update({'file2.html': version,
+                                    'newsubdir/': version})
+    self.assertEqual(self._file_system.Stat('dir1/'),
+                     expected)
+
+    # Stat an added directory.
+    self.assertEqual(self._file_system.Stat('dir1/newsubdir/'),
+                     StatInfo(version, {'a.js': version}))
+    self.assertEqual(self._file_system.Stat('dir1/newsubdir/a.js'),
+                     StatInfo(version))
+    self.assertEqual(self._file_system.Stat('newdir/'),
+                     StatInfo(version, {'1.html': version}))
+    self.assertEqual(self._file_system.Stat('newdir/1.html'),
+                     StatInfo(version))
+
+    # Stat files removed in the patch.
+    self.assertRaises(FileNotFoundError, self._file_system.Stat,
+        'dir2/subdir1/sub1.txt')
+    self.assertRaises(FileNotFoundError, self._file_system.Stat,
+        'dir4/one.txt')
+
+    # Stat empty directories.
+    self.assertEqual(self._file_system.Stat('dir3/'),
+                     StatInfo(old_version, {}))
+    self.assertEqual(self._file_system.Stat('dir4/'),
+                     StatInfo(version, {}))
+    self.assertEqual(self._file_system.Stat('dir5/subdir/'),
+                     StatInfo(version, {}))
+
+    # Stat empty (after patch) directory's parent
+    self.assertEqual(self._file_system.Stat('dir5/'),
+                     StatInfo(version, {'subdir/': version}))
+
+    # Stat files that don't exist either before or after patching.
+    self.assertRaises(FileNotFoundError, self._file_system.Stat,
+        'not_existing/')
+    self.assertRaises(FileNotFoundError, self._file_system.Stat,
+        'dir1/not_existing/')
+    self.assertRaises(FileNotFoundError, self._file_system.Stat,
+        'dir1/not_existing')
+
+if __name__ == '__main__':
+  unittest.main()