'Set up requirements for testing: a user ID and a modulestore'

def setUp(self):

    super(MixedSplitTestCase, self).setUp()
    self.user_id = ModuleStoreEnum.UserID.test
    self.store = MixedModuleStore(None, create_modulestore_instance=create_modulestore_instance, mappings={}, **self.MIXED_OPTIONS)
    self.addCleanup(self.store.close_all_connections)
    self.addCleanup(self.store._drop_database)
