vsfs/vsfs — pull request #24 by eddyxu (2013-07-17 02:53:28+00:00)
Title: Locate index server logic in MasterController

Btw, use file system as storage to test master controller. Because it is too complicate to set up mock objects for each test: `MasterControllerTest` is conceptually an integration test not a unit test, because the tests involves so many classes.

We can still use mock object to test some failure cases that are hard to produce (e.g., file system errors).