Refactor the devserver to make it easier to control caching

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

+# 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 future import Future
+from object_store import ObjectStore
+
+class TestObjectStore(ObjectStore):
+  '''An object store which records its namespace and behaves like a dict, for
+  testing.
+  '''
+  def __init__(self, namespace):
+    self.namespace = namespace
+    self._store = {}
+
+  def SetMulti(self, mapping, **optarg):
+    self._store.update(mapping)
+
+  def GetMulti(self, keys, **optargs):
+    return Future(value=dict((k, v) for k, v in self._store.items()
+                                    if k in keys))
+
+  def Delete(self, key):
+    del self._store[key]