Docserver: Pull knowledge of host file systems into a single

chrome/common/extensions/docs/server2/host_file_system_provider_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.
+

[not at google - send to devlin, 2013/10/08 15:48:39]

ditto

+from copy import deepcopy
+import unittest
+
+from caching_file_system import CachingFileSystem
+from file_system import FileNotFoundError
+from host_file_system_provider import HostFileSystemProvider
+from object_store_creator import ObjectStoreCreator
+from offline_file_system import OfflineFileSystem
+from test_data.canned_data import CANNED_API_FILE_SYSTEM_DATA
+from test_file_system import TestFileSystem
+
+class HostFileSystemProviderTest(unittest.TestCase):
+  def setUp(self):
+    self._idle_path = 'api/idle.json'
+    self._canned_data = deepcopy(CANNED_API_FILE_SYSTEM_DATA)
+
+  def _constructor_for_test(self, branch, **optargs):
+    return TestFileSystem(self._canned_data[branch])
+
+  def testWithCaching(self):
+    creator = HostFileSystemProvider(
+        ObjectStoreCreator.ForTest(),
+        constructor_for_test=self._constructor_for_test)
+
+    fs = creator.GetBranch('1500')
+    first_read = fs.ReadSingle(self._idle_path)
+    self._canned_data['1500']['api']['idle.json'] = 'blah blah blah'
+    second_read = fs.ReadSingle(self._idle_path)
+
+    self.assertEqual(first_read, second_read)
+
+  def testWithOffline(self):
+    creator = HostFileSystemProvider(
+        ObjectStoreCreator.ForTest(),
+        offline=True,
+        constructor_for_test=self._constructor_for_test)
+
+    fs = creator.GetBranch('1500')
+    # Offline file system should raise a FileNotFoundError if read is attempted.
+    self.assertRaises(FileNotFoundError, fs.ReadSingle, self._idle_path)
+
+if __name__ == '__main__':
+  unittest.main()