mockkeep.put.side_effect = arvados.errors.KeepWriteError("fail")
with arvados.arvfile._BlockManager(mockkeep) as blockmanager:
bufferblock = blockmanager.alloc_bufferblock()
mockkeep.put.side_effect = arvados.errors.KeepWriteError("fail")
with arvados.arvfile._BlockManager(mockkeep) as blockmanager:
bufferblock = blockmanager.alloc_bufferblock()